A history of sea power,
by William Oliver Stevens ... and Allan Westcott.

APA Citation

Stevens, W. Oliver., Westcott, A. F. (Allan Ferguson). (1920). A history of sea power. New York: G. H. Doran company.

MLA Citation

Stevens, William Oliver, 1878-1955, and Allan F. (Allan Ferguson) Westcott. A History of Sea Power. New York: G. H. Doran company, 1920.

Warning: These citations may not always be complete (especially for serials).