APA (7th ed.) Citation

United States. Department of Commerce. (1941). St. Lawrence survey: Part 2, Shipping services on St. Lawrence River. [s.n.].

Chicago Style (17th ed.) Citation

United States. Department of Commerce. St. Lawrence Survey: Part 2, Shipping Services on St. Lawrence River. [Washington]: [s.n.], 1941.

MLA (9th ed.) Citation

United States. Department of Commerce. St. Lawrence Survey: Part 2, Shipping Services on St. Lawrence River. [s.n.], 1941.