Asher, J. A. (1973). The framework of German: For schools and universities (11th ed.). Whitcombe and Tombs.

Asher, John Alexander. The Framework of German: For Schools and Universities. 11th ed. Christchurch: Whitcombe and Tombs, 1973.

Asher, John Alexander. The Framework of German: For Schools and Universities. 11th ed. Whitcombe and Tombs, 1973.