APA استشهاد

Bruun, P. (1981). Port engineering (Ed.3.). Gulf publishing company.

استشهاد بنمط شيكاغو

Bruun, Per. Port Engineering. Ed.3. Houston: Gulf publishing company, 1981.

MLA استشهاد

Bruun, Per. Port Engineering. Ed.3. Gulf publishing company, 1981.