APA

United States, . (1975). Airport design standards - airports served by air carriers - surface gradient and line-of-sight. [Washington, D.C: .

Chicago

United States, . 1975. Airport design standards - airports served by air carriers - surface gradient and line-of-sight. [Washington, D.C: .

Harvard

United States, . (1975). Airport design standards - airports served by air carriers - surface gradient and line-of-sight. [Washington, D.C: .

MLA

United States, . Airport design standards - airports served by air carriers - surface gradient and line-of-sight. [Washington, D.C: . 1975.