Gallenkamp, C. (1981). Maya, the riddle and rediscovery of a lost civilization (2d rev. ed.). Penguin Books.
Chicago Style (17th ed.) CitationGallenkamp, Charles. Maya, the Riddle and Rediscovery of a Lost Civilization. 2d rev. ed. Harmondsworth, Middlesex, Eng., New York: Penguin Books, 1981.
MLA (9th ed.) CitationGallenkamp, Charles. Maya, the Riddle and Rediscovery of a Lost Civilization. 2d rev. ed. Penguin Books, 1981.
Warning: These citations may not always be 100% accurate.