APA ציטוט

Hardin, G. (1949). Biology: Its principles and implications (2.). W H Freeman and Comapny.

Chicago Edition Citation

Hardin, Garrelt. Biology: Its Principles and Implications. 2. San Francisco: W H Freeman and Comapny, 1949.

ציטוט MLA

Hardin, Garrelt. Biology: Its Principles and Implications. 2. W H Freeman and Comapny, 1949.