Cita APA (7th ed.)

Durrell, M., Kohl, K. M., & Loftus, G. (1997). Practising German grammar: A workbook for use with Hammer's German grammar and usage (2nd ed.). NTC Pub. Group.

Cita Chicago (17th ed.)

Durrell, Martin, Katrin M. Kohl, i Gudrun Loftus. Practising German Grammar: A Workbook for Use with Hammer's German Grammar and Usage. 2nd ed. Lincolnwood, Ill: NTC Pub. Group, 1997.

Cita MLA (9th ed.)

Durrell, Martin, et al. Practising German Grammar: A Workbook for Use with Hammer's German Grammar and Usage. 2nd ed. NTC Pub. Group, 1997.