Gaya APA

Siregar, F, R., Zainuddin, . (2021). Vocabulary and the difficulties of the students (1). Medan: Merdeka Kreasi.

Gaya MLA

Siregar, Fitri, Rayani., Zainuddin, . "Vocabulary and the difficulties of the students". 1 Medan: Merdeka Kreasi, 2021. Text.