Gaya APA

Bowler, Bill. (1990). Headway Intermediate Pronunciation (- - 1). -: Oxford university press.

Gaya Chicago

Bowler, Bill. Headway Intermediate Pronunciation. - - 1 -: Oxford university press, 1990. Buku.

Gaya MLA

Bowler, Bill. Headway Intermediate Pronunciation. - - 1 -: Oxford university press, 1990. Buku.

Gaya Turabian

Bowler, Bill. Headway Intermediate Pronunciation. - - 1 -: Oxford university press, 1990. Buku.