APA (7th ed.) Zitazioa

Ward, D. C. (2014). Call waiting. Carcanet.

Chicago Style (17th ed.) Zitazioa

Ward, David C. Call Waiting. Manchester, England: Carcanet, 2014.

MLA (9th ed.) Zitazioa

Ward, David C. Call Waiting. Carcanet, 2014.