Putnam 1917, стр. 356–361. Putnam, Ruth (1917). „Appendix A: Etymology of the Word "California": Surmises and Usage”. Ур.: Herbert Ingram Priestley. California: the name. Berkeley: University of California. стр. 356—361.
„Oldlist”. Rocky Mountain Tree Ring Research. Приступљено 08. 01. 2013.
usda.gov
nass.usda.gov
Tolomeo, Vic; Krug, Kelly; Flohr, Doug; Gibson, Jason (31. 10. 2012). „California Agricultural Statistics: 2011 Crop Year”(PDF). National Agricultural Statistics Service. United States Department of Agriculture. Архивирано из оригинала(PDF) 24. 12. 2013. г. Приступљено 01. 07. 2013.
Tolomeo, Vic; Krug, Kelly; Flohr, Doug; Gibson, Jason (31. 10. 2012). „California Agricultural Statistics: 2011 Crop Year”(PDF). National Agricultural Statistics Service. United States Department of Agriculture. Архивирано из оригинала(PDF) 24. 12. 2013. г. Приступљено 01. 07. 2013.