APA (7th ed.) Citation

Wachler, E. (1914). Das Opernproblem.

Chicago Style (17th ed.) Citation

Wachler, Ernst. Das Opernproblem. 1914.

MLA (9th ed.) Citation

Wachler, Ernst. Das Opernproblem. 1914.

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