Cita APA (7a ed.)

Pfeifer, R., & Scheier, C. (1999). Understanding intelligence. MIT.

Cita Chicago Style (17a ed.)

Pfeifer, Rolf, y Christian Scheier. Understanding Intelligence. Cambridge (Massachusetts) [etc.]: MIT, 1999.

Cita MLA (9a ed.)

Pfeifer, Rolf, y Christian Scheier. Understanding Intelligence. MIT, 1999.