Wagner, R., Beethoven, L. v., & Franck, C. [Álbum piano-harmonium]. Druch von Breitkopf.
Chicago Style (17th ed.) CitationWagner, Richard, Ludwig van Beethoven, and César Franck. [Álbum Piano-harmonium]. Leipzig: Druch von Breitkopf.
MLA (9th ed.) CitationWagner, Richard, et al. [Álbum Piano-harmonium]. Druch von Breitkopf.
Warning: These citations may not always be 100% accurate.