APA (7th ed.) Citation

Stratton, C. G. (1917). Mathematical geography in the grades. Journal of Geography, 15, 264. https://doi.org/10.1080/00221341708984051

Chicago Style (17th ed.) Citation

Stratton, C. G. "Mathematical Geography in the Grades." Journal of Geography 15 (1917): 264. https://doi.org/10.1080/00221341708984051.

MLA (9th ed.) Citation

Stratton, C. G. "Mathematical Geography in the Grades." Journal of Geography, vol. 15, 1917, p. 264, https://doi.org/10.1080/00221341708984051.

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