APA (7th ed.) Citation

Welfens, P. J., & Welfens, M. J. (2011). Der Europäische Chopin. Books on Demand.

Chicago Style (17th ed.) Citation

Welfens, Paul J.J, and Maria J. Welfens. Der Europäische Chopin. Norderstedt: Books on Demand, 2011.

MLA (8th ed.) Citation

Welfens, Paul J.J, and Maria J. Welfens. Der Europäische Chopin. Books on Demand, 2011.

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