Cita APA (7th ed.)

Vaughan, W., Börsch-Supan, H., & Neidhardt, H. J. (1972). Caspar David Friedrich 1774-1840: Romantic landscape painting in Dresden.

Cita Chicago (17th ed.)

Vaughan, William, Helmut Börsch-Supan, i Hans Joachim Neidhardt. Caspar David Friedrich 1774-1840: Romantic Landscape Painting in Dresden. London, 1972.

Cita MLA (8th ed.)

Vaughan, William, et al. Caspar David Friedrich 1774-1840: Romantic Landscape Painting in Dresden. 1972.