APA

United States, . (1978). Announcement of availability of summary of airworthiness directives. [Washington, D.C: .

Chicago

United States, . 1978. Announcement of availability of summary of airworthiness directives. [Washington, D.C: .

Harvard

United States, . (1978). Announcement of availability of summary of airworthiness directives. [Washington, D.C: .

MLA

United States, . Announcement of availability of summary of airworthiness directives. [Washington, D.C: . 1978.