APA (7e ed.) Bronvermelding

Eckhard-Black, C., & Whittle, R. (1992). Cassell's contemporary German: A handbook of grammar current usage, and word power. Macmillan.

Chicago (17e ed.) Bronvermelding

Eckhard-Black, Christine, en Ruth Whittle. Cassell's Contemporary German: A Handbook of Grammar Current Usage, and Word Power. New York: Macmillan, 1992.

MLA (9e ed.) Bronvermelding

Eckhard-Black, Christine, en Ruth Whittle. Cassell's Contemporary German: A Handbook of Grammar Current Usage, and Word Power. Macmillan, 1992.