APA (7th ed.) Citation

Ostini, R., & Nering, M. L. (2006). Polytomous item response theory models. Sage University papers / Quantitative applications in the social sciences.

Chicago Style (17th ed.) Citation

Ostini, Remo, and Michael L. Nering. "Polytomous Item Response Theory Models." Sage University Papers / Quantitative Applications in the Social Sciences 2006.

MLA (8th ed.) Citation

Ostini, Remo, and Michael L. Nering. "Polytomous Item Response Theory Models." Sage University Papers / Quantitative Applications in the Social Sciences, 2006.

Warning: These citations may not always be 100% accurate.