Cita APA (7th ed.)
Krohne, D. T. (2001). General ecology (2nd ed.). Brooks/cole.
Cita Chicago (17th ed.)
Krohne, David T. General Ecology. 2nd ed. Australia: Brooks/cole, 2001.
Cita MLA (9th ed.)
Krohne, David T. General Ecology. 2nd ed. Brooks/cole, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.