APA (7th ed.) Citation

Gade, N. W., & Ruthardt, A. Aquarellen, op. 19. C. F. Peter.

Chicago Style (17th ed.) Citation

Gade, Niels Wilhelm, and Adolf Ruthardt. Aquarellen, Op. 19. Leipzig: C. F. Peter.

MLA (9th ed.) Citation

Gade, Niels Wilhelm, and Adolf Ruthardt. Aquarellen, Op. 19. C. F. Peter.