APA

United States, . (1976). Private & commercial pilot glider written test guide. [Washington, D.C: .

Chicago

United States, . 1976. Private & commercial pilot glider written test guide. [Washington, D.C: .

Harvard

United States, . (1976). Private & commercial pilot glider written test guide. [Washington, D.C: .

MLA

United States, . Private & commercial pilot glider written test guide. [Washington, D.C: . 1976.