Gaya APA

Walidi, S. (2006). Step by Step to Speak English (Cet. ke-1). Yogyakarta: Citra Aji Parama.

Gaya MLA

Walidi, S.Pd. "Step by Step to Speak English". Cet. ke-1 Yogyakarta: Citra Aji Parama, 2006. Text.