APA (7th ed.) Citation

Bentley, W. A., & Humphreys, W. J. (1931). Snow crystals (1. ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Bentley, Wilson A., and William J. Humphreys. Snow Crystals. 1. ed. New York [u.a.]: McGraw-Hill, 1931.

MLA (9th ed.) Citation

Bentley, Wilson A., and William J. Humphreys. Snow Crystals. 1. ed. McGraw-Hill, 1931.