Cita APA (7th ed.)

Pearse, A. S. (1939). Animal ecology (2a. ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Pearse, A. S. Animal Ecology. 2a. ed. Nueva York: McGraw-Hill, 1939.

Cita MLA (9th ed.)

Pearse, A. S. Animal Ecology. 2a. ed. McGraw-Hill, 1939.