Παραπομπή σε μορφή APA (7η εκδ.)

Zapf, H. Ecological thought and literature in Europe and Germany: Hubert Zapf. A Global History of Literature and the Environment.(2016).

Παραπομπή σε μορφή Chicago (17η εκδ.)

Zapf, Hubert. "Ecological Thought and Literature in Europe and Germany: Hubert Zapf." A Global History of Literature and the Environment.(2016) .

Παραπομπή σε μορφή MLA (8th εκδ.)

Zapf, Hubert. "Ecological Thought and Literature in Europe and Germany: Hubert Zapf." A Global History of Literature and the Environment.(2016), .