APA (7th ed.) Citation

Wallace, J., & Pearson, J. (1998). What Makes a Corner a Corner? Teaching children mathematics, 5(1), 6-9. https://doi.org/10.5951/TCM.5.1.0006

Chicago Style (17th ed.) Citation

Wallace, John, and Jennifer Pearson. "What Makes a Corner a Corner?" Teaching Children Mathematics 5, no. 1 (1998): 6-9. https://doi.org/10.5951/TCM.5.1.0006.

MLA (9th ed.) Citation

Wallace, John, and Jennifer Pearson. "What Makes a Corner a Corner?" Teaching Children Mathematics, vol. 5, no. 1, 1998, pp. 6-9, https://doi.org/10.5951/TCM.5.1.0006.