Cita APA (7th ed.)

Parker, T. J. (1951). A Text-book of Zoology (3rd ed.). Macmillan.

Cita Chicago (17th ed.)

Parker, T. Jeffery. A Text-book of Zoology. 3rd ed. London: Macmillan, 1951.

Cita MLA (9th ed.)

Parker, T. Jeffery. A Text-book of Zoology. 3rd ed. Macmillan, 1951.