APA

National Industrial Conference Board, . (1931). The cost of living in the United States: 1914-1930. New York: .

Chicago

National Industrial Conference Board, . 1931. The cost of living in the United States: 1914-1930. New York: .

Harvard

National Industrial Conference Board, . (1931). The cost of living in the United States: 1914-1930. New York: .

MLA

National Industrial Conference Board, . The cost of living in the United States: 1914-1930. New York: . 1931.