APA (7th ed.) Citation

Zemlinsky, A., Feld, L., & Zemlinsky, A. (1988). Erster Akt. Delta Music.

Chicago Style (17th ed.) Citation

Zemlinsky, Alexander, Leo Feld, and Alexander Zemlinsky. Erster Akt. Königsdorf: Delta Music, 1988.

MLA (8th ed.) Citation

Zemlinsky, Alexander, et al. Erster Akt. Delta Music, 1988.