Cita APA (7a ed.)

Ridgely,Robert S. and Guy Tudor. (1989). The birds of South America: II. The Suboscine passerines. University of Texas Press.

Cita Chicago Style (17a ed.)

Ridgely,Robert S. and Guy Tudor. The Birds of South America: II. The Suboscine Passerines. Texas - EEUU: University of Texas Press, 1989.

Cita MLA (8a ed.)

Ridgely,Robert S. and Guy Tudor. The Birds of South America: II. The Suboscine Passerines. University of Texas Press, 1989.