APA(7版)引用形式

Ryan, J. C., & Elkin, V. (1992). Life support: Conserving biological diversity. Worldwatch Institute.

Chicagoスタイル(17版)引用形式

Ryan, John C., , Vicki Elkin. Life Support: Conserving Biological Diversity. Washington, D.C: Worldwatch Institute, 1992.

MLA(9版)引用形式

Ryan, John C., , Vicki Elkin. Life Support: Conserving Biological Diversity. Worldwatch Institute, 1992.

警告: この引用は必ずしも正確ではありません.