National Geographic society. (1992). Beyond the horizon: Adventures in faraway lands. National Geographic Society.
芝加哥风格引文National Geographic society. Beyond the Horizon: Adventures in Faraway Lands. Washington, D.C.: National Geographic Society, 1992.
MLA引文National Geographic society. Beyond the Horizon: Adventures in Faraway Lands. National Geographic Society, 1992.
警告：这些引文格式不一定是100％准确.