APA (7th ed.) Citation

Morrell, R. W. (1931). Oil tankers (2d ed., rev. and enl.). Simmon-Boardman Publishing Company.

Chicago Style (17th ed.) Citation

Morrell, Robert W. Oil Tankers. 2d ed., rev. and enl. New York: Simmon-Boardman Publishing Company, 1931.

MLA (9th ed.) Citation

Morrell, Robert W. Oil Tankers. 2d ed., rev. and enl. Simmon-Boardman Publishing Company, 1931.