Παραπομπή APA

Shepard, F. P. (1959). Earth beneath the sea. The johns hopkins press.

Παραπομπή Chicago Style

Shepard, Francis P. Earth Beneath the Sea. Baltimore: The johns hopkins press, 1959.

Παραπομπή MLA

Shepard, Francis P. Earth Beneath the Sea. The johns hopkins press, 1959.