Bruun, P. (1976). Port engineering (2d ed.). Gulf Pub. Co., Book Pub. Division.
Lua i Stíl Chicago (17ú heag.)Bruun, Per. Port Engineering. 2d ed. Houston: Gulf Pub. Co., Book Pub. Division, 1976.
Lua MLA (8ú heag.)Bruun, Per. Port Engineering. 2d ed. Gulf Pub. Co., Book Pub. Division, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.