Wyss, B. (1990). Ragnarök of Illusion: Richard Wagner's Mystical Abyss at Bayreuth. October.
Chicago-Zitierstil (17. Ausg.)Wyss, Beat. "Ragnarök of Illusion: Richard Wagner's Mystical Abyss at Bayreuth." October 1990.
MLA-Zitierstil (8. Ausg.)Wyss, Beat. "Ragnarök of Illusion: Richard Wagner's Mystical Abyss at Bayreuth." October, 1990.
警告：这些引文格式不一定是100％准确.