Παραπομπή APA

Craig, R. (1980). Steam tramps and cargo liners: :1850 -1950. Her majesty's stationery office.

Παραπομπή Chicago Style

Craig, Robin. Steam Tramps and Cargo Liners: :1850 -1950. London: Her majesty's stationery office, 1980.

Παραπομπή MLA

Craig, Robin. Steam Tramps and Cargo Liners: :1850 -1950. Her majesty's stationery office, 1980.