APA (7th ed.) Citation

Petzoldt, R. (1956). Robert Schumann. Bibliographisches Institut.

Chicago Style (17th ed.) Citation

Petzoldt, Richard. Robert Schumann. Leipzig: Bibliographisches Institut, 1956.

MLA (8th ed.) Citation

Petzoldt, Richard. Robert Schumann. Bibliographisches Institut, 1956.

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