Cita APA (7a ed.)

Friesen, M. E. (1998). The internal sell: Encouraging executive influence and accomplishment. Quorum Books.

Cita Chicago Style (17a ed.)

Friesen, Michael E. The Internal Sell: Encouraging Executive Influence and Accomplishment. Westport, Conn.: Quorum Books, 1998.

Cita MLA (9a ed.)

Friesen, Michael E. The Internal Sell: Encouraging Executive Influence and Accomplishment. Quorum Books, 1998.