Cita APA (7th ed.)

Crew, M. A. (1991). Competition and innovation in postal services. Kluwer Academic.

Cita Chicago (17th ed.)

Crew, Michael A. Competition and Innovation in Postal Services. Boston: Kluwer Academic, 1991.

Cita MLA (9th ed.)

Crew, Michael A. Competition and Innovation in Postal Services. Kluwer Academic, 1991.