Watkins, W. P. (1953). Cooperation and housing. [s.n.].
Cita Chicago Style (17a ed.)Watkins, William Pascoe. Cooperation and Housing. [S.l.]: [s.n.], 1953.
Cita MLA (9a ed.)Watkins, William Pascoe. Cooperation and Housing. [s.n.], 1953.
Precaución: Estas citas no son 100% exactas.