Não informado. AAPA advisory. American Association of Port Authorities.
Chicago-Zitierstil (17. Ausg.)Não informado. AAPA Advisory. Washington: American Association of Port Authorities.
MLA-Zitierstil (8. Ausg.)Não informado. AAPA Advisory. American Association of Port Authorities.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.