APA (7th ed.) Citation

O'Kane, R. (2016). Writing an overview. Modern English Teacher, 25(3), 39.

Chicago Style (17th ed.) Citation

O'Kane, Rory. "Writing an Overview." Modern English Teacher 25, no. 3 (2016): 39.

MLA (9th ed.) Citation

O'Kane, Rory. "Writing an Overview." Modern English Teacher, vol. 25, no. 3, 2016, p. 39.