APA (7th ed.) Citation

Gräf, G. (1971). English for you 4. Volk und Wissen.

Chicago Style (17th ed.) Citation

Gräf, Gerhard. English for You 4. Berlin: Volk und Wissen, 1971.

MLA (8th ed.) Citation

Gräf, Gerhard. English for You 4. Volk und Wissen, 1971.

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