Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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