APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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