Gaya APA
M.A., D, M, S. et al (2018).
Teaching language skills : preparing materials and selecting techniques .
Yogyakarta:
Graha Ilmu.
Gaya MLA
M.A., Dr., Muhammad, Sukirlan,. et al.
"Teaching language skills : preparing materials and selecting techniques".
Yogyakarta:
Graha Ilmu,
2018.
.