APA ציטוט

Hardin, G. (1961). Biology, its principles and implications. San Francisco: W. H. Freeman and Co..

Trích dẫn kiểu Chicago

Hardin, Garrett. Biology, Its Principles and Implications. San Francisco: W. H. Freeman and Co., 1961.

ציטוט MLA

Hardin, Garrett. Biology, Its Principles and Implications. San Francisco: W. H. Freeman and Co., 1961.