APA

United States, . (1978). Certification of airway systems, systems, and equipment. [Washington, D.C: .

Chicago

United States, . 1978. Certification of airway systems, systems, and equipment. [Washington, D.C: .

Harvard

United States, . (1978). Certification of airway systems, systems, and equipment. [Washington, D.C: .

MLA

United States, . Certification of airway systems, systems, and equipment. [Washington, D.C: . 1978.