APA (7th ed.) Citation

EO, L. (1923). The Memory of the Feeble-Minded. Studies in mental inefficiency, 4(2), 27.

Chicago Style (17th ed.) Citation

EO, Lewis. "The Memory of the Feeble-Minded." Studies in Mental Inefficiency 4, no. 2 (1923): 27.

MLA (9th ed.) Citation

EO, Lewis. "The Memory of the Feeble-Minded." Studies in Mental Inefficiency, vol. 4, no. 2, 1923, p. 27.