APA (7th ed.) Citation

Haas, R. (1926). Die Wiener Oper. Eligius-Verl.

Chicago Style (17th ed.) Citation

Haas, Robert. Die Wiener Oper. Wien [u.a.]: Eligius-Verl, 1926.

MLA (9th ed.) Citation

Haas, Robert. Die Wiener Oper. Eligius-Verl, 1926.

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