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.