APA (7th ed.) Citation

Wagner, R. (1950). Tannhäuser (Private record.). Unique Opera Records.

Chicago Style (17th ed.) Citation

Wagner, Richard. Tannhäuser. Private record. S.l: Unique Opera Records, 1950.

MLA (9th ed.) Citation

Wagner, Richard. Tannhäuser. Private record. Unique Opera Records, 1950.

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