Beth, H. L., Hader, A., & Kappel, R. (1984). 25 years of world shipping. Fairplay.
Chicago-čujuhus (17. p.)Beth, Hans Ludwig, Arnulf Hader, juo Robert Kappel. 25 Years of World Shipping. Londres: Fairplay, 1984.
MLA-čujuhus (9. p.)Beth, Hans Ludwig, et al. 25 Years of World Shipping. Fairplay, 1984.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.