APA(7版)引用形式

Orr, D. W. (2011). Hope is an imperative: The essential David Orr. Island Press.

Chicagoスタイル(17版)引用形式

Orr, David W. Hope Is an Imperative: The Essential David Orr. Washington, DC: Island Press, 2011.

MLA(9版)引用形式

Orr, David W. Hope Is an Imperative: The Essential David Orr. Island Press, 2011.