Παραπομπή σε μορφή APA (7η εκδ.)

AGER, D. V. (1963). Principles paleoecology - an introduction to study of how and where animals and plants lived in the past - Derek V. Ager. McGraw Hill.

Παραπομπή σε μορφή Chicago (17η εκδ.)

AGER, Derek V. Principles Paleoecology - an Introduction to Study of How and Where Animals and Plants Lived in the Past - Derek V. Ager. McGraw Hill, 1963.

Παραπομπή σε μορφή MLA (8th εκδ.)

AGER, Derek V. Principles Paleoecology - an Introduction to Study of How and Where Animals and Plants Lived in the Past - Derek V. Ager. McGraw Hill, 1963.