APA

United States, . (19). Subject: maintenance of terminal air/ground communication facilities. [Washington, D.C: .

Chicago

United States, . 19. Subject: maintenance of terminal air/ground communication facilities. [Washington, D.C: .

Harvard

United States, . (19). Subject: maintenance of terminal air/ground communication facilities. [Washington, D.C: .

MLA

United States, . Subject: maintenance of terminal air/ground communication facilities. [Washington, D.C: . 19.