Cita APA

Pence, G. E., & Gregory E. Pence. (2007). The. Boston: McGraw-Hill.

Chicago Style Citation

Pence, Gregory E., i Gregory E. Pence. The. Boston: McGraw-Hill, 2007.

Cita MLA

Pence, Gregory E., i Gregory E. Pence. The. Boston: McGraw-Hill, 2007.

Atenció: Aquestes cites poden no estar 100% correctes.