APA(7版)引用形式
National Geographic Society. La tierra. National Geographic Society.
Chicagoスタイル(17版)引用形式
National Geographic Society. La Tierra. Buenos Aires: National Geographic Society.
MLA(9版)引用形式
National Geographic Society. La Tierra. National Geographic Society.
警告: この引用は必ずしも正確ではありません.