Παραπομπή σε μορφή APA (7η εκδ.)

Ager, D. V. (1963). Principles of paleoecology: An introduction to the study of how and where animals and plants lived in the past. Mc Graw-Hill.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ager, Derek Victor. Principles of Paleoecology: An Introduction to the Study of How and Where Animals and Plants Lived in the Past. New York: Mc Graw-Hill, 1963.

Παραπομπή σε μορφή MLA (9th εκδ.)

Ager, Derek Victor. Principles of Paleoecology: An Introduction to the Study of How and Where Animals and Plants Lived in the Past. Mc Graw-Hill, 1963.