APA

United States, . (1970). Air traffic control service for area navigation equipped aircraft operating in United States national airspace system [with list of references]. [Washington, D.C: .

Chicago

United States, . 1970. Air traffic control service for area navigation equipped aircraft operating in United States national airspace system [with list of references]. [Washington, D.C: .

Harvard

United States, . (1970). Air traffic control service for area navigation equipped aircraft operating in United States national airspace system [with list of references]. [Washington, D.C: .

MLA

United States, . Air traffic control service for area navigation equipped aircraft operating in United States national airspace system [with list of references]. [Washington, D.C: . 1970.