APA (7th ed.) Citation

Alpha, T. R., & Morley, J. (1983). Comparative physiographic diagrams of Mount St. Helens, Washington, and Crater Lake, Oregon. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Alpha, Tau Rho, and Jim Morley. Comparative Physiographic Diagrams of Mount St. Helens, Washington, and Crater Lake, Oregon. Reston, Va.: U.S. Geological Survey, 1983.

MLA (9th ed.) Citation

Alpha, Tau Rho, and Jim Morley. Comparative Physiographic Diagrams of Mount St. Helens, Washington, and Crater Lake, Oregon. U.S. Geological Survey, 1983.