Wry, E., & Mullis, I. V. S. (2023). Developing the PIRLS 2021 achievement instruments. In M. von Davier, I. V. S. Mullis, B. Fishbein, & P. Foy (Eds.), Methods and Procedures: PIRLS 2021 Technical Report (pp. 1.1-1.24). Boston College, TIMSS & PIRLS
International Study Center. https://doi.org/10.6017/lse.tpisc.tr2101.kb7549
ISBN: 978-1-889938-68-4
Library of Congress Catalog Card Number: 2023902579
