Fischman, Bernice and Tilt, Ken. "History of the Christmas Tree （页面存档备份，存于互联网档案馆）", College of Agriculture - Horticulture, Auburn University. Retrieved 14 July 2007.
Sonogan, Bruce. "Growing cut Christmas trees （页面存档备份，存于互联网档案馆）, (PDF), Agriculture Notes, Victoria Department of Primary Industries, January 2006, ISSN 1329-8062. Retrieved 4 September 2007.
Leuty, Todd. "Christmas tree production互联网档案馆的存檔，存档日期2007-08-18.", Ontario Ministry of Agriculture, Food and Rural Affairs, 26 March 1999; 31 July 2003. Retrieved 3 September 2007.
Vukina, Tomislav, et al. (2001). A Hotelling-Faustmann Explanation of the Structure of Christmas Tree Prices. (JSTOR （页面存档备份，存于互联网档案馆）), American Journal of Agricultural Economics 83 (3): 513-525. Retrieved 3 September 2007.
Davis, George C. and Wohlgenant, Michael K. "Demand Elasticities from a Discrete Choice Model: The Natural Christmas Tree Market", (JSTOR （页面存档备份，存于互联网档案馆）), American Journal of Agricultural Economics, Vol. 75, No. 3, August 1993, pp. 730-738. Retrieved 10 September 2007.
"Forestry: Christmas Tree Farming （页面存档备份，存于互联网档案馆）", Mississippi Agricultural and Forestry Experiment Station, Mississippi State University, 3 November 2006. Retrieved 5 September 2007.
Chastagner, Gary A., and Benson, D. Michael. The Christmas Tree: Traditions, Production and Diseases （页面存档备份，存于互联网档案馆）, Plant Management Network International, (authors from North Carolina State University and Washington State University), 13 October 2001. Retrieved 4 September 2007.
Barney, D.L., and Finnerty, T.L. "Christmas trees is this the crop for you?互联网档案馆的存檔，存档日期2008-02-27.", (PDF), Alternative Agricultural Enterprises, College of Agricultural and Life Sciences, University of Idaho, June 1995. Retrieved 3 September 2007.
uiuc.edu
urbanext.uiuc.edu
Wolford, Ron. Christmas Tree Facts互联网档案馆的存檔，存档日期2008-05-16., Christmas Trees & More, University of Illinois. Retrieved 25 August 2007.
"Christmas Tree Facts互联网档案馆的存檔，存档日期2006-09-22.", Plant Materials Program, National Resources Conservation Service, 16 December 2003; 23 January 2006. Retrieved 3 September 2007.
nass.usda.gov
"Woodland Crops: 2002 and 1997互联网档案馆的存檔，存档日期2007-10-03.", (PDF), 2002 Census of Agriculture, National Agricultural Statistics Service United States Department of Agriculture. Retrieved 14 July 2007.
Sonogan, Bruce. "Growing cut Christmas trees （页面存档备份，存于互联网档案馆）, (PDF), Agriculture Notes, Victoria Department of Primary Industries, January 2006, ISSN 1329-8062. Retrieved 4 September 2007.
Chastagner, Gary A., and Benson, D. Michael. The Christmas Tree: Traditions, Production and Diseases （页面存档备份，存于互联网档案馆）, Plant Management Network International, (authors from North Carolina State University and Washington State University), 13 October 2001. Retrieved 4 September 2007.
"Christmas Tree Facts互联网档案馆的存檔，存档日期2006-09-22.", Plant Materials Program, National Resources Conservation Service, 16 December 2003; 23 January 2006. Retrieved 3 September 2007.
"Woodland Crops: 2002 and 1997互联网档案馆的存檔，存档日期2007-10-03.", (PDF), 2002 Census of Agriculture, National Agricultural Statistics Service United States Department of Agriculture. Retrieved 14 July 2007.
Fischman, Bernice and Tilt, Ken. "History of the Christmas Tree （页面存档备份，存于互联网档案馆）", College of Agriculture - Horticulture, Auburn University. Retrieved 14 July 2007.
Wolford, Ron. Christmas Tree Facts互联网档案馆的存檔，存档日期2008-05-16., Christmas Trees & More, University of Illinois. Retrieved 25 August 2007.
Leuty, Todd. "Christmas tree production互联网档案馆的存檔，存档日期2007-08-18.", Ontario Ministry of Agriculture, Food and Rural Affairs, 26 March 1999; 31 July 2003. Retrieved 3 September 2007.
"Forestry: Christmas Tree Farming （页面存档备份，存于互联网档案馆）", Mississippi Agricultural and Forestry Experiment Station, Mississippi State University, 3 November 2006. Retrieved 5 September 2007.
Bondi, Mike. "An Introduction to Growing Christmas Trees互联网档案馆的存檔，存档日期2007-12-27.", Oregon State University Extension Service, Oregon State University, via Washington State University. Retrieved 4 September 2007.
Barney, D.L., and Finnerty, T.L. "Christmas trees is this the crop for you?互联网档案馆的存檔，存档日期2008-02-27.", (PDF), Alternative Agricultural Enterprises, College of Agricultural and Life Sciences, University of Idaho, June 1995. Retrieved 3 September 2007.
Vukina, Tomislav, et al. (2001). A Hotelling-Faustmann Explanation of the Structure of Christmas Tree Prices. (JSTOR （页面存档备份，存于互联网档案馆）), American Journal of Agricultural Economics 83 (3): 513-525. Retrieved 3 September 2007.
Davis, George C. and Wohlgenant, Michael K. "Demand Elasticities from a Discrete Choice Model: The Natural Christmas Tree Market", (JSTOR （页面存档备份，存于互联网档案馆）), American Journal of Agricultural Economics, Vol. 75, No. 3, August 1993, pp. 730-738. Retrieved 10 September 2007.
Bondi, Mike. "An Introduction to Growing Christmas Trees互联网档案馆的存檔，存档日期2007-12-27.", Oregon State University Extension Service, Oregon State University, via Washington State University. Retrieved 4 September 2007.
