Friedlaender, A. (1989). German in three months. Hugo's Language Books Ltd..
Chicagoスタイル(17版)引用形式Friedlaender, Ann. German in Three Months. Britain: Hugo's Language Books Ltd., 1989.
MLA(9版)引用形式Friedlaender, Ann. German in Three Months. Hugo's Language Books Ltd., 1989.
警告: この引用は必ずしも正確ではありません.