APA (7th ed.) Citation

Tryon, R. M. (1927). A study of the difficulties in history textbooks for Grade V. Elementary School Journal, 27(9), 717.

Chicago Style (17th ed.) Citation

Tryon, R. M. "A Study of the Difficulties in History Textbooks for Grade V." Elementary School Journal 27, no. 9 (1927): 717.

MLA (9th ed.) Citation

Tryon, R. M. "A Study of the Difficulties in History Textbooks for Grade V." Elementary School Journal, vol. 27, no. 9, 1927, p. 717.