Citazione APA

Allen, A. A. (1968). book of bird life (2nd ed.). D. Van Nostrand Company. Inc.

Stile di citazione Chicago

Allen, Arthur A. Book of Bird Life. 2nd ed. New Jersey: D. Van Nostrand Company. Inc, 1968.

Citazione MLA

Allen, Arthur A. Book of Bird Life. 2nd ed. D. Van Nostrand Company. Inc, 1968.