Παραπομπή APA

O'Loughlin, C. (1967). Economics of sea transport. Pergamon press.

Παραπομπή Chicago Style

O'Loughlin, Carleen. Economics of Sea Transport. London: Pergamon press, 1967.

Παραπομπή MLA

O'Loughlin, Carleen. Economics of Sea Transport. Pergamon press, 1967.