APA (7th ed.) Citation

Whelpley, J. D. (1915). The trade of the world. The Century Co.

Chicago Style (17th ed.) Citation

Whelpley, James D. The Trade of the World. New York: The Century Co, 1915.

MLA (9th ed.) Citation

Whelpley, James D. The Trade of the World. The Century Co, 1915.