Cita APA (7th ed.)

Purves, W. K. (1995). Life: The Science of Biology (4th ed.). Sinauer Associates.

Cita Chicago (17th ed.)

Purves, William K. Life: The Science of Biology. 4th ed. Massachusetts: Sinauer Associates, 1995.

Cita MLA (9th ed.)

Purves, William K. Life: The Science of Biology. 4th ed. Sinauer Associates, 1995.