United States. Dept. of Housing and Urban Development. Environmental Planning Division. (1970). Airport environs: Land use controls. The Department.
Chicago-viite (17. p.)United States. Dept. of Housing and Urban Development. Environmental Planning Division. Airport Environs: Land Use Controls. Washington: The Department, 1970.
MLA-viite (8. p.)United States. Dept. of Housing and Urban Development. Environmental Planning Division. Airport Environs: Land Use Controls. The Department, 1970.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.