APA (7th ed.) Citation

Roberts, K. L. (1937). Northwest passage. Doubleday, Doran & company, inc..

Chicago Style (17th ed.) Citation

Roberts, Kenneth Lewis. Northwest Passage. Garden City, N. Y.: Doubleday, Doran & company, inc., 1937.

MLA (9th ed.) Citation

Roberts, Kenneth Lewis. Northwest Passage. Doubleday, Doran & company, inc., 1937.

Warning: These citations may not always be 100% accurate.