APA (7th ed.) Citation

Lull, H. W., & Marquis, R. W. (1957). Forests guard the Potomac. Interstate Commission on the Potomac River Basin.

Chicago Style (17th ed.) Citation

Lull, Howard William, and Ralph William Marquis. Forests Guard the Potomac. Washington: Interstate Commission on the Potomac River Basin, 1957.

MLA (9th ed.) Citation

Lull, Howard William, and Ralph William Marquis. Forests Guard the Potomac. Interstate Commission on the Potomac River Basin, 1957.