Cita APA (7a ed.)

Sibley, C. G., & Ahlquist, J. E. (1990). Phylogeny and classification of birds: A study in molecular evolution. Yale University Press.

Cita Chicago Style (17a ed.)

Sibley, Charles Gald, y John E. Ahlquist. Phylogeny and Classification of Birds: A Study in Molecular Evolution. New Haven [etc.]: Yale University Press, 1990.

Cita MLA (9a ed.)

Sibley, Charles Gald, y John E. Ahlquist. Phylogeny and Classification of Birds: A Study in Molecular Evolution. Yale University Press, 1990.