APA (7th ed.) Zitazioa

Friedlaender, A. (1989). German in three months. Hugo's Language Books Ltd..

Chicago Style (17th ed.) Zitazioa

Friedlaender, Ann. German in Three Months. Britain: Hugo's Language Books Ltd., 1989.

MLA (9th ed.) Zitazioa

Friedlaender, Ann. German in Three Months. Hugo's Language Books Ltd., 1989.