Friedlaender, A. (1989). German in three months. Hugo's Language Books Ltd..
Chicago Style (17th ed.) CitationFriedlaender, Ann. German in Three Months. Britain: Hugo's Language Books Ltd., 1989.
MLA引文Friedlaender, Ann. German in Three Months. Hugo's Language Books Ltd., 1989.
警告:這些引文格式不一定是100%准確.