Gaya APA

Lande, S, K., Astuti, E, M. (2017). Forward an english 1 : course for vocational school students grade X (cet ke-1). Jakarta: Erlangga.

Gaya MLA

Lande, Shyla, K.., Astuti, Eka, Mulya. "Forward an english 1 : course for vocational school students grade X". cet ke-1 Jakarta: Erlangga, 2017. Text.