Kopp, G., & Frolich, K. (1992). Pingpong 1: Arbeitsbuch. Max Hueber Verlag.
Chicago Style (17th ed.) CitationKopp, Gabriele, and Konstanze Frolich. Pingpong 1: Arbeitsbuch. Germany: Max Hueber Verlag, 1992.
MLA (8th ed.) CitationKopp, Gabriele, and Konstanze Frolich. Pingpong 1: Arbeitsbuch. Max Hueber Verlag, 1992.
Warning: These citations may not always be 100% accurate.