APA(7版)引用形式
Allen, W. L. National Geographic: Vol. 203, no. 4, April 2003. National Geographic Society.
Chicagoスタイル(17版)引用形式
Allen, William L. National Geographic: Vol. 203, No. 4, April 2003. Washington, EUA: National Geographic Society.
MLA(9版)引用形式
Allen, William L. National Geographic: Vol. 203, No. 4, April 2003. National Geographic Society.
警告: この引用は必ずしも正確ではありません.