APA aipamena

Soars, J. &. L. (1986). Headway: Intermediate. Hong Kong: Oxford University.

Chicago Style aipamena

Soars, John & Liz. Headway: Intermediate. Hong Kong: Oxford University, 1986.

MLA aipamena

Soars, John & Liz. Headway: Intermediate. Hong Kong: Oxford University, 1986.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.