Cita APA (7a ed.)

Sijtsma, K., & Molenaar, I. W. (2002). Introduction to nonparametric item response theory. SAGE.

Cita Chicago Style (17a ed.)

Sijtsma, K., y Ivo W. Molenaar. Introduction to Nonparametric Item Response Theory. Thousand Oaks, Calif. [etc.]: SAGE, 2002.

Cita MLA (9a ed.)

Sijtsma, K., y Ivo W. Molenaar. Introduction to Nonparametric Item Response Theory. SAGE, 2002.