Zulaeha, Ode, Wardani Rahayu, and Yuliatri Sastrawijaya. “The Estimates Item Parameter for Multidimensional Three-Parameter Logistics”. KnE Social Sciences 4, no. 14 (November 11, 2020): 315–322. Accessed June 23, 2021. https://knepublishing.com/index.php/KnE-Social/article/view/7889.