APA (7th ed.) Citation

Johnson, E. R. (1912). Panama Canal traffic and tolls. [Government Printing Office].

Chicago Style (17th ed.) Citation

Johnson, Emory R. Panama Canal Traffic and Tolls. Washington: [Government Printing Office], 1912.

MLA (8th ed.) Citation

Johnson, Emory R. Panama Canal Traffic and Tolls. [Government Printing Office], 1912.