Couper, A. D. (1972). The geography of sea transport. Hutchin University Library.
Chicago-čujuhus (17. p.)Couper, A. D. The Geography of Sea Transport. London: Hutchin University Library, 1972.
MLA-čujuhus (9. p.)Couper, A. D. The Geography of Sea Transport. Hutchin University Library, 1972.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.