APA ציטוט

Hopkins, C. G. (1910). Soil fertility and permanent agriculture. Ginn.

Chicago Style (17th ed.) Citation

Hopkins, Cyril G. Soil Fertility and Permanent Agriculture. Boston, New York: Ginn, 1910.

ציטוט MLA

Hopkins, Cyril G. Soil Fertility and Permanent Agriculture. Ginn, 1910.