– Gunawan Suryoputro, GunawandanHerri Mulyono, HerridanTri Wintolo Apoko, Tri (2013) Single-Correct Answer (SCA) and Multiple-Correct Answer (MCA) in Multiple-Choice Computer Assisted Language Testing (CALT) Program. In: Proceedings of the 21st International Conference on Computers in Education 2013. UHAMKA PRESS, Jakarta, pp. 835-837. ISBN 978-602-8040-72-3