APA (7th ed.) Citation

Ritter, C. J., & Dennen, W. H. (1966). Blackening of natural quartz by γ-irradiation. American Mineralogist, 51, 220.

Chicago Style (17th ed.) Citation

Ritter, C. J., and W. H. Dennen. "Blackening of Natural Quartz by γ-irradiation." American Mineralogist 51 (1966): 220.

MLA (9th ed.) Citation

Ritter, C. J., and W. H. Dennen. "Blackening of Natural Quartz by γ-irradiation." American Mineralogist, vol. 51, 1966, p. 220.