Decker, R., Decker, B., Decker, B., & Decker, B. (1998). Volcanoes (3rd ed.). New York: W. H. Freeman and Company.
Παραπομπή Chicago StyleDecker, Robert, Barbara Decker, Barbara Decker, and Barbara Decker. Volcanoes. 3rd ed. New York: W. H. Freeman and Company, 1998.
Παραπομπή MLADecker, Robert, Barbara Decker, Barbara Decker, and Barbara Decker. Volcanoes. 3rd ed. New York: W. H. Freeman and Company, 1998.
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