Gaya APA

P., R, A., Hastuti, E. (2018). Let's Understand English (Pertama). Surakarta: PT. ERA PUSTAKA UTAMA.

Gaya MLA

P., Reni, Agustian., Hastuti, Eni. "Let's Understand English". Pertama Surakarta: PT. ERA PUSTAKA UTAMA, 2018. Text.