APA (7th ed.) Citation

Boynton, H. W. (1931). Platinum in 1930. Engineering & Mining Journal (00958948), 131, 118.

Chicago Style (17th ed.) Citation

Boynton, H. W. "Platinum in 1930." Engineering & Mining Journal (00958948) 131 (1931): 118.

MLA (9th ed.) Citation

Boynton, H. W. "Platinum in 1930." Engineering & Mining Journal (00958948), vol. 131, 1931, p. 118.

Warning: These citations may not always be 100% accurate.