Gaya APA

Purwono,Dra.A.Widyastuti,Drs.HS.Adinegoro, D. (1997). FIRST STEP 4 An English Book For Elementary Schools . Klaten: PT INTAN PARIWARA.

Gaya MLA

Purwono,Dra.A.Widyastuti,Drs.HS.Adinegoro, Drs.Edy. "FIRST STEP 4 An English Book For Elementary Schools". Klaten: PT INTAN PARIWARA, 1997. Teks/Gambar.