APA (7th ed.) Citation

Leavell U. W. and others & U. W. Leavell, M. L. F. (1961). Frontiers to Explore. American book company.

Chicago Style (17th ed.) Citation

Leavell U. W. and others and M. L. Friebele U. W. Leavell. Frontiers to Explore. New York: American book company, 1961.

MLA (8th ed.) Citation

Leavell U. W. and others and M. L. Friebele U. W. Leavell. Frontiers to Explore. American book company, 1961.