"Prestoea Hook. f". Germplasm Resources Information Network. United States Department of Agriculture. 2007-10-05. Archived from the original on 2009-05-07. Retrieved 2009-07-18.
"Prestoea Hook. f". Germplasm Resources Information Network. United States Department of Agriculture. 2007-10-05. Archived from the original on 2009-05-07. Retrieved 2009-07-18.