Craig, R. (1980). Steam tramps and cargo liners: :1850 -1950. Her majesty's stationery office.
استشهاد بنمط شيكاغوCraig, Robin. Steam Tramps and Cargo Liners: :1850 -1950. London: Her majesty's stationery office, 1980.
MLA استشهادCraig, Robin. Steam Tramps and Cargo Liners: :1850 -1950. Her majesty's stationery office, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.