APA(7版)引用形式
Graves, W. National Geographic: Vol. 180, no. 1, July 1991. National Geographic Society.
Chicagoスタイル(17版)引用形式
Graves, William. National Geographic: Vol. 180, No. 1, July 1991. Washington, EUA: National Geographic Society.
MLA(9版)引用形式
Graves, William. National Geographic: Vol. 180, No. 1, July 1991. National Geographic Society.
警告: この引用は必ずしも正確ではありません.