Gaya APA

S.Pd., R, A, P., S.S, E, H. (2018). Let's Understand English . Surakarta: PT Era Pustaka Utama.

Gaya MLA

S.Pd., Reni, Agustin, P.,., S.S, Eni, Hestutui,. "Let's Understand English". Surakarta: PT Era Pustaka Utama, 2018. Text.