Gaya APA

Astuti, E. (2017). Forward An English Course For Vocational School Student Grade X (Cet 1). Jakarta: Erlangga.

Gaya MLA

Astuti, Eka,Mulya. "Forward An English Course For Vocational School Student Grade X". Cet 1 Jakarta: Erlangga, 2017. Buku Paket Siswa.