Cita APA (7th ed.)

Gräf, G. (1984). English for You. Volk und Wissen.

Cita Chicago (17th ed.)

Gräf, Gerhard. English for You. Berlin: Volk und Wissen, 1984.

Cita MLA (8th ed.)

Gräf, Gerhard. English for You. Volk und Wissen, 1984.