APA (7th ed.) Citation

Gräf, G. (1968). Let's Speak English 3. Volk und Wissen.

Chicago Style (17th ed.) Citation

Gräf, Gerhard. Let's Speak English 3. Berlin: Volk und Wissen, 1968.

MLA (8th ed.) Citation

Gräf, Gerhard. Let's Speak English 3. Volk und Wissen, 1968.

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