APA (7th ed.) Citation

Marks, J. (2018). How Vocabulary is Learned. Modern English Teacher, 27(4), 87.

Chicago Style (17th ed.) Citation

Marks, Jonathan. "How Vocabulary Is Learned." Modern English Teacher 27, no. 4 (2018): 87.

MLA (9th ed.) Citation

Marks, Jonathan. "How Vocabulary Is Learned." Modern English Teacher, vol. 27, no. 4, 2018, p. 87.