Cita APA (7a ed.)

Wright, R. The negro in Pennsylvania. A study in economic history. A. M. E. book.

Cita Chicago Style (17a ed.)

Wright, Richard. The Negro in Pennsylvania. A Study in Economic History. Philadelphia: A. M. E. book.

Cita MLA (8a ed.)

Wright, Richard. The Negro in Pennsylvania. A Study in Economic History. A. M. E. book.