Παραπομπή APA

Wohlbier, R. H. (1987). Bulk port development, design and operation. Trans tech.

Παραπομπή Chicago Style

Wohlbier, Reinhard H. Bulk Port Development, Design and Operation. G D R: Trans tech, 1987.

Παραπομπή MLA

Wohlbier, Reinhard H. Bulk Port Development, Design and Operation. Trans tech, 1987.