APA aipamena

National Gallery of Art (U.S.), Pierpont Morgan Library, & Grasselli, M. M. 1. 7. 2. (2007). Private treasures: Four centuries of European master drawings. National Gallery of Art.

Chicago Style aipamena

National Gallery of Art (U.S.), Pierpont Morgan Library, and Margaret Morgan 1951- 710 2 Grasselli. Private Treasures: Four Centuries of European Master Drawings. Washington, D.C: National Gallery of Art, 2007.

MLA aipamena

National Gallery of Art (U.S.), et al. Private Treasures: Four Centuries of European Master Drawings. National Gallery of Art, 2007.