Gaya APA
Walidi, S.
(2006).
Step by Step to Speak English
(
Cet 1)
.
Yogyakarta:
PT. Citra Aji Parama.
Gaya MLA
Walidi, S.Pd..
"Step by Step to Speak English".
Cet 1
Yogyakarta:
PT. Citra Aji Parama,
2006.
Text.