USA Department of Housing and Urban Development. (1977). Controlling access in highrise buildings: Approaches and guidelines. U.S. Govt. Print. Office.
Chicago-Zitierstil (17. Ausg.)USA Department of Housing and Urban Development. Controlling Access in Highrise Buildings: Approaches and Guidelines. Washington, D.C: U.S. Govt. Print. Office, 1977.
MLA-Zitierstil (9. Ausg.)USA Department of Housing and Urban Development. Controlling Access in Highrise Buildings: Approaches and Guidelines. U.S. Govt. Print. Office, 1977.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.