APA-referens (7:e uppl.)

Kowalchik, C., & Hylton, . W. H. (1987). Rodale's illustrated encyclopedia of herbs (First edition.). Rodale Press.

Chicago-referens (17:e uppl.)

Kowalchik, Claire, och William H. Hylton. Rodale's Illustrated Encyclopedia of Herbs. First edition. Pensylvania: Rodale Press, 1987.

MLA-referens (8:e uppl.)

Kowalchik, Claire, och William H. Hylton. Rodale's Illustrated Encyclopedia of Herbs. First edition. Rodale Press, 1987.