APA (7th ed.) Citation

Gräf, G. (1964). Let's Speak English 1. Volk und Wissen.

Chicago Style (17th ed.) Citation

Gräf, Gerhard. Let's Speak English 1. Berlin: Volk und Wissen, 1964.

MLA (8th ed.) Citation

Gräf, Gerhard. Let's Speak English 1. Volk und Wissen, 1964.

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