APA (7th ed.) Citation

Kopp G. Gabriele & Büttner S. Siegfried. (2011). Planet 1: Arbeitsbuch. Ismaning, Hueber Verlag, 2011.

Chicago Style (17th ed.) Citation

Kopp G. Gabriele and Büttner S. Siegfried. Planet 1: Arbeitsbuch. Ismaning, Hueber Verlag, 2011, 2011.

MLA (9th ed.) Citation

Kopp G. Gabriele and Büttner S. Siegfried. Planet 1: Arbeitsbuch. Ismaning, Hueber Verlag, 2011, 2011.

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