Zapf, H. Ecological thought and literature in Europe and Germany: Hubert Zapf. A Global History of Literature and the Environment.(2016).
Chicago-referens (17:e uppl.)Zapf, Hubert. "Ecological Thought and Literature in Europe and Germany: Hubert Zapf." A Global History of Literature and the Environment.(2016) .
MLA-referens (8:e uppl.)Zapf, Hubert. "Ecological Thought and Literature in Europe and Germany: Hubert Zapf." A Global History of Literature and the Environment.(2016), .
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.