APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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