APA (7th ed.) Citation

Armstrong, E. A. (1973). A study of bird song (2d enl. ed.). Dover Publications.

Chicago Style (17th ed.) Citation

Armstrong, Edward Allworthy. A Study of Bird Song. 2d enl. ed. New York: Dover Publications, 1973.

MLA (9th ed.) Citation

Armstrong, Edward Allworthy. A Study of Bird Song. 2d enl. ed. Dover Publications, 1973.