APA aipamena

Walidi. (2006). Step by Step to Speak English. Citra Aji Parama.

Chicago Style aipamena

Walidi. Step By Step to Speak English. Citra Aji Parama, 2006.

MLA aipamena

Walidi. Step By Step to Speak English. Citra Aji Parama, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.