APA

Johnson R. L., Hanneman K. & Shymansky J. (2003). Discovering Ancient Civilizations. Washington: National Geographic Society.

Chicago

Johnson Rebecca L, Hanneman Kristin and Shymansky James. 2003. Discovering Ancient Civilizations. Washington: National Geographic Society.

Harvard

Johnson R. L., Hanneman K. and Shymansky J. (2003). Discovering Ancient Civilizations. Washington: National Geographic Society.

MLA

Johnson Rebecca L, Hanneman Kristin and Shymansky James. Discovering Ancient Civilizations. Washington: National Geographic Society. 2003.