APA (7th ed.) Citation

Hartmann, K. A., Whitman, W., & Reisiger, H. Pieces - BSB Mus.ms. 12937: [without collection title].

Chicago Style (17th ed.) Citation

Hartmann, Karl Amadeus, Walt Whitman, and Hans Reisiger. Pieces - BSB Mus.ms. 12937: [without Collection Title].

MLA (9th ed.) Citation

Hartmann, Karl Amadeus, et al. Pieces - BSB Mus.ms. 12937: [without Collection Title].