APA (7th ed.) Citation

Grant Heiken, K. W. (1985). Volcanic ash. University of California.

Chicago Style (17th ed.) Citation

Grant Heiken, Kenneth Wohletz. Volcanic Ash. University of California, 1985.

MLA (8th ed.) Citation

Grant Heiken, Kenneth Wohletz. Volcanic Ash. University of California, 1985.

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