Cita APA (7a ed.)

Modley, R., & Myers, W. R. (1976). Handbook of pictorial symbols: 3,250 examples from international sources. Dover Publications.

Cita Chicago Style (17a ed.)

Modley, Rudolf, y William R. Myers. Handbook of Pictorial Symbols: 3,250 Examples from International Sources. New York: Dover Publications, 1976.

Cita MLA (9a ed.)

Modley, Rudolf, y William R. Myers. Handbook of Pictorial Symbols: 3,250 Examples from International Sources. Dover Publications, 1976.