Cita APA

Allen, A. A. (1961). Book of bird life (2nd ed.). Toronto.

Citación estilo Chicago

Allen, Arthur A. Book of Bird Life. 2nd ed. New york: Toronto, 1961.

Cita MLA

Allen, Arthur A. Book of Bird Life. 2nd ed. Toronto, 1961.

Warning: These citations may not always be 100% accurate.