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Mullis, I. V. S., Cotter, K. E., Fishbein, B. G., & Centurino, V. A. S. (2016). Developing the ÷ÈÓ°Ö±²¥ 2015 achievement items. In M. O. Martin, I. V. S. Mullis, & M. Hooper (Eds.), Methods and Procedures in ÷ÈÓ°Ö±²¥ 2015 (pp.1.1-1.22). Retrieved from Boston College, ÷ÈÓ°Ö±²¥; PIRLS International Study Center website: http://timss.bc.edu/publications/timss/2015-methods/chapter-1.html
Methods and Procedures in ÷ÈÓ°Ö±²¥ 2015
Michael O. Martin, Ina V.S. Mullis, and Martin Hooper, Editors
Ina V.S. Mullis, Kerry E. Cotter, Bethany G. Fishbein, and Victoria A.S. Centurino