APA (7th ed.) Citation

Collyer, C. (1918). By-products from your boiler insurance policy. Factory., 20, 235.

Chicago Style (17th ed.) Citation

Collyer, C. "By-products from Your Boiler Insurance Policy." Factory. 20 (1918): 235.

MLA (9th ed.) Citation

Collyer, C. "By-products from Your Boiler Insurance Policy." Factory., vol. 20, 1918, p. 235.