APA (7th ed.) Citation

Contor, R. J. (1963). The underworld of Oregon Caves National Monument. Crater Lake Natural History Association.

Chicago Style (17th ed.) Citation

Contor, Roger J. The Underworld of Oregon Caves National Monument. [Place of publication not identified]: Crater Lake Natural History Association, 1963.

MLA (9th ed.) Citation

Contor, Roger J. The Underworld of Oregon Caves National Monument. Crater Lake Natural History Association, 1963.

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