APA (7th ed.) Zitazioa

(1995). Theory and practice of distance education / Börje Holmberg.

Chicago Style (17th ed.) Zitazioa

Theory and Practice of Distance Education / Börje Holmberg. 1995.

MLA (9th ed.) Zitazioa

Theory and Practice of Distance Education / Börje Holmberg. 1995.