APA (7th ed.) Zitazioa

Beth, H. L., Hader, A., & Kappel, R. (1984). 25 years of world shipping. Fairplay.

Chicago Style (17th ed.) Zitazioa

Beth, Hans Ludwig, Arnulf Hader, eta Robert Kappel. 25 Years of World Shipping. Londres: Fairplay, 1984.

MLA (9th ed.) Zitazioa

Beth, Hans Ludwig, et al. 25 Years of World Shipping. Fairplay, 1984.