APA (7th ed.) Citation

McIntyre, L., & Alarco, E. (1975). The incredible Incas and their timeless land. The National Geographic Society.

Chicago Style (17th ed.) Citation

McIntyre, Loren, and Eugenio Alarco. The Incredible Incas and Their Timeless Land. Washington, D.C: The National Geographic Society, 1975.

MLA (9th ed.) Citation

McIntyre, Loren, and Eugenio Alarco. The Incredible Incas and Their Timeless Land. The National Geographic Society, 1975.