Cita APA (7th ed.)

Hume, J. P., & Walters, M. (2012). Extinct birds. T. & A. D. Poyser.

Cita Chicago (17th ed.)

Hume, Julian P., i Michael Walters. Extinct Birds. London: T. & A. D. Poyser, 2012.

Cita MLA (9th ed.)

Hume, Julian P., i Michael Walters. Extinct Birds. T. & A. D. Poyser, 2012.