APA (7th ed.) Citation

Hellwig, G. (1979). Oper, Operette, Musical ([4a ed.].). Herder.

Chicago Style (17th ed.) Citation

Hellwig, Gerhard. Oper, Operette, Musical. [4a ed.]. Freiburg: Herder, 1979.

MLA (9th ed.) Citation

Hellwig, Gerhard. Oper, Operette, Musical. [4a ed.]. Herder, 1979.

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