Sharpton, V. L., & Ward, P. D. (1990). Global catastrophes in earth history: An interdisciplinary conference on impacts, volcanism, and mass mortality. Geological Society of America.
Chicago Style (17th ed.) CitationSharpton, Virgil L., and Peter D. Ward. Global Catastrophes in Earth History: An Interdisciplinary Conference on Impacts, Volcanism, and Mass Mortality. Boulder, Colo.: Geological Society of America, 1990.
MLA (9th ed.) CitationSharpton, Virgil L., and Peter D. Ward. Global Catastrophes in Earth History: An Interdisciplinary Conference on Impacts, Volcanism, and Mass Mortality. Geological Society of America, 1990.
Warning: These citations may not always be 100% accurate.