APA (7th ed.) Citation

Johnson, W. F. (1906). Four centuries of the Panama canal. H. Holt and company.

Chicago Style (17th ed.) Citation

Johnson, Willis Fletcher. Four Centuries of the Panama Canal. New York: H. Holt and company, 1906.

MLA (9th ed.) Citation

Johnson, Willis Fletcher. Four Centuries of the Panama Canal. H. Holt and company, 1906.