Cita APA (7th ed.)

(1964). Penn-Jersey transportation study. n.p..

Cita Chicago (17th ed.)

Penn-Jersey Transportation Study. Philadelphia, Pa.: n.p., 1964.

Cita MLA (8th ed.)

Penn-Jersey Transportation Study. n.p., 1964.

Atenció: Aquestes cites poden no estar 100% correctes.