Meyer, K., & Wongel, G. (1983). Petroleum - Jonny (2. Auflage.). Kinderbuchverlag.
Chicago Style (17th ed.) CitationMeyer, Klaus, and Günter Wongel. Petroleum - Jonny. 2. Auflage. Berlin: Kinderbuchverlag, 1983.
MLA (8th ed.) CitationMeyer, Klaus, and Günter Wongel. Petroleum - Jonny. 2. Auflage. Kinderbuchverlag, 1983.
Warning: These citations may not always be 100% accurate.