Cita APA (7a ed.)

Billina, A., Brill, L. M., & Techmer, M. (2010). Wortschatz & Grammatik A1. Hueber.

Cita Chicago Style (17a ed.)

Billina, Anneli, Lilli Marlen Brill, y Marion Techmer. Wortschatz & Grammatik A1. Ismaning: Hueber, 2010.

Cita MLA (9a ed.)

Billina, Anneli, et al. Wortschatz & Grammatik A1. Hueber, 2010.