Cita APA (7a ed.)

Petro, S. (1957). The labor policy of the free society. Ronald.

Cita Chicago Style (17a ed.)

Petro, Sylvester. The Labor Policy of the Free Society. New York: Ronald, 1957.

Cita MLA (9a ed.)

Petro, Sylvester. The Labor Policy of the Free Society. Ronald, 1957.