APA (7th ed.) Citation

Haas, J., Mozart, W. A., & Haas, J. Studies - BSB Mus.coll. 4.356: [without title?].

Chicago Style (17th ed.) Citation

Haas, Joseph, Wolfgang Amadeus Mozart, and Joseph Haas. Studies - BSB Mus.coll. 4.356: [without Title?].

MLA (9th ed.) Citation

Haas, Joseph, et al. Studies - BSB Mus.coll. 4.356: [without Title?].