Cita APA (7th ed.)

(2017). Delta Academic Objectives - Reading Skills B2-C1: Coursebook. Ernst Klett Sprachen GmbH.

Cita Chicago (17th ed.)

Delta Academic Objectives - Reading Skills B2-C1: Coursebook. Germany: Ernst Klett Sprachen GmbH, 2017.

Cita MLA (9th ed.)

Delta Academic Objectives - Reading Skills B2-C1: Coursebook. Ernst Klett Sprachen GmbH, 2017.