Roberts, J. (1988). A dictionary of Michelangelo's watermarks: [published by the occasion of the Exhibition "Michelangelo Draftsman" presented at the National Gallery of Art, Washington, 9 October - 11 December 1988] / Jane Roberts. Olivetti.
Παραπομπή σε μορφή Chicago (17η εκδ.)Roberts, Jane. A Dictionary of Michelangelo's Watermarks: [published by the Occasion of the Exhibition "Michelangelo Draftsman" Presented at the National Gallery of Art, Washington, 9 October - 11 December 1988] / Jane Roberts. Milan: Olivetti, 1988.
Παραπομπή σε μορφή MLA (8th εκδ.)Roberts, Jane. A Dictionary of Michelangelo's Watermarks: [published by the Occasion of the Exhibition "Michelangelo Draftsman" Presented at the National Gallery of Art, Washington, 9 October - 11 December 1988] / Jane Roberts. Olivetti, 1988.