Gallenkamp, C. (1981). Maya, the riddle and rediscovery of a lost civilization (2nd rev. ed.). Penguin.
Chicago Style (17th ed.) CitationGallenkamp, Charles. Maya, the Riddle and Rediscovery of a Lost Civilization. 2nd rev. ed. Harmondsworth, Middlesex, Eng: Penguin, 1981.
MLA (8th ed.) CitationGallenkamp, Charles. Maya, the Riddle and Rediscovery of a Lost Civilization. 2nd rev. ed. Penguin, 1981.
Warning: These citations may not always be 100% accurate.