(1988). Worldwide cruises and shiplines: Operating instructions and use of the OAG Worldwide cruise and shipline guide (2nd ed.). National Pub.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWorldwide Cruises and Shiplines: Operating Instructions and Use of the OAG Worldwide Cruise and Shipline Guide. 2nd ed. Emlsford, N.Y: National Pub, 1988.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWorldwide Cruises and Shiplines: Operating Instructions and Use of the OAG Worldwide Cruise and Shipline Guide. 2nd ed. National Pub, 1988.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.