APA (7th ed.) Citation

Johnson, E. R. (1912). Panama Canal traffic and tolls. [Govt. Print. Off.].

Chicago Style (17th ed.) Citation

Johnson, Emory R. Panama Canal Traffic and Tolls. Washington, D.C.: [Govt. Print. Off.], 1912.

MLA (8th ed.) Citation

Johnson, Emory R. Panama Canal Traffic and Tolls. [Govt. Print. Off.], 1912.

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