APA (7th ed.) Citation

Hartmann, K. A., Whitman, W., Reisiger, H., & Hartmann, K. A. Pieces, Excerpts - BSB Mus.ms. 12930: [without collection title].

Chicago Style (17th ed.) Citation

Hartmann, Karl Amadeus, Walt Whitman, Hans Reisiger, and Karl Amadeus Hartmann. Pieces, Excerpts - BSB Mus.ms. 12930: [without Collection Title].

MLA (9th ed.) Citation

Hartmann, Karl Amadeus, et al. Pieces, Excerpts - BSB Mus.ms. 12930: [without Collection Title].