Hough, B. O. (1920). Ocean traffic and trade. Lasalle Extension University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHough, Benjamin Olney. Ocean Traffic and Trade. Chicago: Lasalle Extension University, 1920.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHough, Benjamin Olney. Ocean Traffic and Trade. Lasalle Extension University, 1920.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.