Παραπομπή APA

Mannion, A. (1999). Natural environmental changes: The last 3 million years. Routledge.

Παραπομπή Chicago Style

Mannion, A.M. Natural Environmental Changes: The Last 3 Million Years. London: Routledge, 1999.

Παραπομπή MLA

Mannion, A.M. Natural Environmental Changes: The Last 3 Million Years. Routledge, 1999.