APA (7th ed.) Citation

Portig, G. (1882). Richard Wagner's "Ring, der Nibelungen" und "Parsifal". Henninger.

Chicago Style (17th ed.) Citation

Portig, Gustav. Richard Wagner's "Ring, Der Nibelungen" Und "Parsifal". Heilbronn: Henninger, 1882.

MLA (9th ed.) Citation

Portig, Gustav. Richard Wagner's "Ring, Der Nibelungen" Und "Parsifal". Henninger, 1882.

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