Gaya APA
Walidi, S.
(2006).
Step by Step to Speak English
(
Cetakan 1)
.
YOGYAKARTA:
PT CITRA AJI PARAMA.
Gaya MLA
Walidi, S.Pd..
"Step by Step to Speak English".
Cetakan 1
YOGYAKARTA:
PT CITRA AJI PARAMA,
2006.
Text.