APA引文

Lapointe, A., Phillips, G. W., & Mead, N. A. (1989). A world of differences: An international assessment of mathematics and science. Educational Testing Service.

Chicago Style (17th ed.) Citation

Lapointe, Archie, Gary W. Phillips, and Nancy A. Mead. A World of Differences: An International Assessment of Mathematics and Science. [Princeton, N.J.]: Educational Testing Service, 1989.

MLA引文

Lapointe, Archie, et al. A World of Differences: An International Assessment of Mathematics and Science. Educational Testing Service, 1989.