Cita APA (7a ed.)

Ruppenthal, K. M. (1962). Transportation frontiers. Stanford Univ.

Cita Chicago Style (17a ed.)

Ruppenthal, Karl Maxwell. Transportation Frontiers. Stanford, Calif., Grad. Sch. of Bus: Stanford Univ, 1962.

Cita MLA (9a ed.)

Ruppenthal, Karl Maxwell. Transportation Frontiers. Stanford Univ, 1962.