Krebs, C. J. (2001). The Ecology Place [Đĩa CD-ROM] (5th ed.). San Francisco: Benjamin Cummings.
シカゴスタイル引用形Krebs, Charles J. The Ecology Place [Đĩa CD-ROM]. 5th ed. San Francisco: Benjamin Cummings, 2001.
MLA引用形式Krebs, Charles J. The Ecology Place [Đĩa CD-ROM]. 5th ed. San Francisco: Benjamin Cummings, 2001.
警告: この引用は必ずしも正確ではありません.