Gaya APA
Astuti, S, K, L, E, M. (2017).
Forward An English Course For Vocational School Students Grade XI .
Jakarta:
Penerbit Erlangga.
Gaya MLA
Astuti, Shyla, K., Lande,, Eka, Mulya.
"Forward An English Course For Vocational School Students Grade XI".
Jakarta:
Penerbit Erlangga,
2017.
Text.