Gaya APA

Astuti, E, M., Lande, S, K. (2017). Forward an english course for vocational school students grade XI . Jakarta: Erlangga.

Gaya MLA

Astuti, Eka, Mulya., Lande, Shyla, K. "Forward an english course for vocational school students grade XI". Jakarta: Erlangga, 2017. Text.