APA

United States, . (19). Maintenance of the Kansas City Air Route Traffic Control Center. [Washington, D.C: .

Chicago

United States, . 19. Maintenance of the Kansas City Air Route Traffic Control Center. [Washington, D.C: .

Harvard

United States, . (19). Maintenance of the Kansas City Air Route Traffic Control Center. [Washington, D.C: .

MLA

United States, . Maintenance of the Kansas City Air Route Traffic Control Center. [Washington, D.C: . 19.