Style de citation APA (7e éd.)

Morales, J. O. (1943). A credit study of 167 tobacco farms, Puerto Rico, 1939-40.

Style de citation Chicago (17e éd.)

Morales, Julio O. A Credit Study of 167 Tobacco Farms, Puerto Rico, 1939-40. [Ithaca, N.Y.], 1943.

Style de citation MLA (8e éd.)

Morales, Julio O. A Credit Study of 167 Tobacco Farms, Puerto Rico, 1939-40. 1943.