APA (7th ed.) Citation

Schumann, R., Schumann, C., & Nauhaus, G. (1993). The marriage diaries of Robert & Clara Schumann: From their wedding day through the Russia trip. Northeastern University Press.

Chicago Style (17th ed.) Citation

Schumann, Robert, Clara Schumann, and Gerd Nauhaus. The Marriage Diaries of Robert & Clara Schumann: From Their Wedding Day Through the Russia Trip. Boston: Northeastern University Press, 1993.

MLA (9th ed.) Citation

Schumann, Robert, et al. The Marriage Diaries of Robert & Clara Schumann: From Their Wedding Day Through the Russia Trip. Northeastern University Press, 1993.