APA

United States, . (1972). Certification procedures for products and parts. [Washington, D.C: .

Chicago

United States, . 1972. Certification procedures for products and parts. [Washington, D.C: .

Harvard

United States, . (1972). Certification procedures for products and parts. [Washington, D.C: .

MLA

United States, . Certification procedures for products and parts. [Washington, D.C: . 1972.