APA (7th ed.) Citation

Chapin, C. E., & Elston, W. E. (1979). Ash-flow tuffs. Geological Society of America.

Chicago Style (17th ed.) Citation

Chapin, Charles E., and Wolfgang E. Elston. Ash-flow Tuffs. Boulder, Colo.: Geological Society of America, 1979.

MLA (9th ed.) Citation

Chapin, Charles E., and Wolfgang E. Elston. Ash-flow Tuffs. Geological Society of America, 1979.