APA (7th ed.) Citation

Petzoldt, R. (1961). Robert Schumann. Verlag Enzyklopädie.

Chicago Style (17th ed.) Citation

Petzoldt, Richard. Robert Schumann. Leipzig: Verlag Enzyklopädie, 1961.

MLA (8th ed.) Citation

Petzoldt, Richard. Robert Schumann. Verlag Enzyklopädie, 1961.

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