APA (7th ed.) Citation

Loken, E., & Rulison, K. L. (2010). Estimation of a four-parameter item response theory model. The British journal of mathematical and statistical psychology, 63(3), 509-525. doi:10.1348/000711009X474502

Chicago Style (17th ed.) Citation

Loken, Eric, and Kelly L. Rulison. "Estimation of a Four-parameter Item Response Theory Model." The British Journal of Mathematical and Statistical Psychology 63, no. 3 (2010): 509-525. https://doi.org/10.1348/000711009X474502.

MLA (9th ed.) Citation

Loken, Eric, and Kelly L. Rulison. "Estimation of a Four-parameter Item Response Theory Model." The British Journal of Mathematical and Statistical Psychology, vol. 63, no. 3, 2010, pp. 509-525, https://doi.org/10.1348/000711009X474502.