APA ציטוט

Krebs, C. J. (2001). The Ecology Place [Đĩa CD-ROM] (5th ed.). San Francisco: Benjamin Cummings.

Trích dẫn kiểu Chicago

Krebs, Charles J. The Ecology Place [Đĩa CD-ROM]. 5th ed. San Francisco: Benjamin Cummings, 2001.

ציטוט MLA

Krebs, Charles J. The Ecology Place [Đĩa CD-ROM]. 5th ed. San Francisco: Benjamin Cummings, 2001.