Cita APA

Shelton, R., & Richard Shelton. (2007). The. Pittsburgh, Pa: University of Pittsburgh Press.

Chicago Style Citation

Shelton, Richard, i Richard Shelton. The. Pittsburgh, Pa: University of Pittsburgh Press, 2007.

Cita MLA

Shelton, Richard, i Richard Shelton. The. Pittsburgh, Pa: University of Pittsburgh Press, 2007.

Atenció: Aquestes cites poden no estar 100% correctes.