APA

United States, . (2002). NAICS: North American industry classification system: presented by Beverly A. Roberts and Francis McCormick, Service Sector Statistics Division, US Census Bureau. [Landham, MD]: US Census Bureau.

Chicago

United States, . 2002. NAICS: North American industry classification system: presented by Beverly A. Roberts and Francis McCormick, Service Sector Statistics Division, US Census Bureau. [Landham, MD]: US Census Bureau.

Harvard

United States, . (2002). NAICS: North American industry classification system: presented by Beverly A. Roberts and Francis McCormick, Service Sector Statistics Division, US Census Bureau. [Landham, MD]: US Census Bureau.

MLA

United States, . NAICS: North American industry classification system: presented by Beverly A. Roberts and Francis McCormick, Service Sector Statistics Division, US Census Bureau. [Landham, MD]: US Census Bureau. 2002.