APA (7th ed.) Citation

Petzoldt, R. (1963). Richard Wagner. Verlag Enzyklopädie.

Chicago Style (17th ed.) Citation

Petzoldt, Richard. Richard Wagner. Leipzig: Verlag Enzyklopädie, 1963.

MLA (8th ed.) Citation

Petzoldt, Richard. Richard Wagner. Verlag Enzyklopädie, 1963.

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