APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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