APA (7th ed.) Citation

Koopmann, H. (1975). Heinrich Heine. Wiss. Buchges..

Chicago Style (17th ed.) Citation

Koopmann, Helmut. Heinrich Heine. Darmstadt: Wiss. Buchges., 1975.

MLA (8th ed.) Citation

Koopmann, Helmut. Heinrich Heine. Wiss. Buchges., 1975.

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