Cita APA (7th ed.)

Petrullo, V. (1947). Puerto Rican paradox. University of Pennsylvania Press.

Cita Chicago (17th ed.)

Petrullo, Vincenzo. Puerto Rican Paradox. Philadelphia: University of Pennsylvania Press, 1947.

Cita MLA (9th ed.)

Petrullo, Vincenzo. Puerto Rican Paradox. University of Pennsylvania Press, 1947.