Eckhard-Black, C., & Whittle, R. (1992). Cassell's contemporary German: A handbook of grammar current usage, and word power. Macmillan.
Chicagoスタイル(17版)引用形式Eckhard-Black, Christine, , Ruth Whittle. Cassell's Contemporary German: A Handbook of Grammar Current Usage, and Word Power. New York: Macmillan, 1992.
MLA(9版)引用形式Eckhard-Black, Christine, , Ruth Whittle. Cassell's Contemporary German: A Handbook of Grammar Current Usage, and Word Power. Macmillan, 1992.
警告: この引用は必ずしも正確ではありません.