Gaya APA
Walidi, S.
(2006).
STEP BY STEP TO SPEAK ENGLISH
.
Klaten:
PT Citra Aji Parama.
Gaya MLA
Walidi, S.Pd..
"STEP BY STEP TO SPEAK ENGLISH".
Klaten:
PT Citra Aji Parama,
2006.
Text.