APA (7th ed.) Citation

United States. Department of Commerce. (1940). The St. Lawrence Survey: Part 4, The Effect of the St. Lawrence Seaway upon existing harbors. [s.n.].

Chicago Style (17th ed.) Citation

United States. Department of Commerce. The St. Lawrence Survey: Part 4, The Effect of the St. Lawrence Seaway upon Existing Harbors. [Washington]: [s.n.], 1940.

MLA (9th ed.) Citation

United States. Department of Commerce. The St. Lawrence Survey: Part 4, The Effect of the St. Lawrence Seaway upon Existing Harbors. [s.n.], 1940.