Παραπομπή APA

Schafer, W., & Oertel,Irmgard Graig,G Y. (1972). Ecology and palaecoecology of marine environments. Oliver&Boyd.

Παραπομπή Chicago Style

Schafer, Wilhelm, και Oertel,Irmgard Graig,G Y. Ecology and Palaecoecology of Marine Environments. Edinburgh: Oliver&Boyd, 1972.

Παραπομπή MLA

Schafer, Wilhelm, και Oertel,Irmgard Graig,G Y. Ecology and Palaecoecology of Marine Environments. Oliver&Boyd, 1972.