APA (7th ed.) Citation

Martens, C., & Martens, P. (1964). Ubungstexte zur deutschen Aussprache / [by] C. Martens [and] P. Martens (2nd ed.). Hueber Verlag.

Chicago Style (17th ed.) Citation

Martens, C., and P. Martens. Ubungstexte Zur Deutschen Aussprache / [by] C. Martens [and] P. Martens. 2nd ed. Hueber Verlag, 1964.

MLA (9th ed.) Citation

Martens, C., and P. Martens. Ubungstexte Zur Deutschen Aussprache / [by] C. Martens [and] P. Martens. 2nd ed. Hueber Verlag, 1964.

Warning: These citations may not always be 100% accurate.