APA (7th ed.) Citation

Wagner, R., Nilsson, B., Köth, E., Soukupová, V., Windgassen, W., Wohlfahrt, E., . . . Böhm, K. (1990). Siegfried. Philips.

Chicago Style (17th ed.) Citation

Wagner, Richard, et al. Siegfried. [Western Germany]: Philips, 1990.

MLA (9th ed.) Citation

Wagner, Richard, et al. Siegfried. Philips, 1990.