Style de citation APA (7e éd.)

Siewers, A. K. The green otherworlds of early medieval literature: Alfred K. Siewers. The Cambridge companion to literature and the environment.(2014).

Style de citation Chicago (17e éd.)

Siewers, Alfred K. "The Green Otherworlds of Early Medieval Literature: Alfred K. Siewers." The Cambridge Companion to Literature and the Environment.(2014) .

Style de citation MLA (8e éd.)

Siewers, Alfred K. "The Green Otherworlds of Early Medieval Literature: Alfred K. Siewers." The Cambridge Companion to Literature and the Environment.(2014), .