APA

United States, . (1969). Airborne automatic direction finder installations (low & medium frequency). [Washington, D.C: .

Chicago

United States, . 1969. Airborne automatic direction finder installations (low & medium frequency). [Washington, D.C: .

Harvard

United States, . (1969). Airborne automatic direction finder installations (low & medium frequency). [Washington, D.C: .

MLA

United States, . Airborne automatic direction finder installations (low & medium frequency). [Washington, D.C: . 1969.