APA (7th ed.) Citation

Roy, S. K., & Wyant, R. K. (1953). Fresh-water limestone from the Torola Valley, northeastern El Salvador. Chicago Natural History Museum.

Chicago Style (17th ed.) Citation

Roy, Sharat Kumar, and Robert Kriss Wyant. Fresh-water Limestone from the Torola Valley, Northeastern El Salvador. [Chicago]: Chicago Natural History Museum, 1953.

MLA (9th ed.) Citation

Roy, Sharat Kumar, and Robert Kriss Wyant. Fresh-water Limestone from the Torola Valley, Northeastern El Salvador. Chicago Natural History Museum, 1953.