Heacox, K. (2016). National Geographic the national parks: An illustrated history. National Geographic.
芝加哥风格引文Heacox, Kim. National Geographic the National Parks: An Illustrated History. Washington, D.C: National Geographic, 2016.
MLA引文Heacox, Kim. National Geographic the National Parks: An Illustrated History. National Geographic, 2016.
警告：这些引文格式不一定是100％准确.