APA (7th ed.) Citation

Chu, H., Treagust, D. F., & Chandrasegaran, A. (2009). A stratified study of students' understanding of basic optics concepts in different contexts using two-tier multiple-choice items. Research in science & technological education, 27(3), 253-265. https://doi.org/10.1080/02635140903162553

Chicago Style (17th ed.) Citation

Chu, Hye-Eun, David F. Treagust, and A.L Chandrasegaran. "A Stratified Study of Students' Understanding of Basic Optics Concepts in Different Contexts Using Two-tier Multiple-choice Items." Research in Science & Technological Education 27, no. 3 (2009): 253-265. https://doi.org/10.1080/02635140903162553.

MLA (9th ed.) Citation

Chu, Hye-Eun, et al. "A Stratified Study of Students' Understanding of Basic Optics Concepts in Different Contexts Using Two-tier Multiple-choice Items." Research in Science & Technological Education, vol. 27, no. 3, 2009, pp. 253-265, https://doi.org/10.1080/02635140903162553.

Warning: These citations may not always be 100% accurate.