Dunn, M. G. (1989). Exploring your world: The adventure of geography. National Geographic Society.
芝加哥风格引文Dunn, Margery G. Exploring Your World: The Adventure of Geography. Washington, D.C.: National Geographic Society, 1989.
MLA引文Dunn, Margery G. Exploring Your World: The Adventure of Geography. National Geographic Society, 1989.
警告：这些引文格式不一定是100％准确.