APA

Hall C. E., Pettet Z. R. & Stany Zjednoczone. (1935). Negroes in the United States 1920-32. Washington: United States. Governmet Printing Office.

Chicago

Hall Charles Edward, Pettet Zellmer Roswell and Stany Zjednoczone. 1935. Negroes in the United States 1920-32. Washington: United States. Governmet Printing Office.

Harvard

Hall C. E., Pettet Z. R. and Stany Zjednoczone. (1935). Negroes in the United States 1920-32. Washington: United States. Governmet Printing Office.

MLA

Hall Charles Edward, Pettet Zellmer Roswell and Stany Zjednoczone. Negroes in the United States 1920-32. Washington: United States. Governmet Printing Office. 1935.