APA

United States, .State data center: 1999 census handbook. Washington: U.S. Goverment Printing Office, 1999: .

Chicago

United States, .State data center: 1999 census handbook. Washington: U.S. Goverment Printing Office, 1999: .

Harvard

United States, .State data center: 1999 census handbook. Washington: U.S. Goverment Printing Office, 1999: .

MLA

United States, .Washington: U.S. Goverment Printing Office, 1999: . .