Cita APA (7th ed.)

Harlow, E., & Parsons, I. (1974). The Encyclopedia of wild life. Spring Books.

Cita Chicago (17th ed.)

Harlow, Eve, i Iain Parsons. The Encyclopedia of Wild Life. London: Spring Books, 1974.

Cita MLA (9th ed.)

Harlow, Eve, i Iain Parsons. The Encyclopedia of Wild Life. Spring Books, 1974.