Παραπομπή APA

Butter, D. (2000). Guide to ship repair estimates in man hours. Butter worth - Heinemann.

Παραπομπή Chicago Style

Butter, Don. Guide to Ship Repair Estimates in Man Hours. Oxford: Butter worth - Heinemann, 2000.

Παραπομπή MLA

Butter, Don. Guide to Ship Repair Estimates in Man Hours. Butter worth - Heinemann, 2000.