Roy, A. (1999). The National Gallery Van Dycks: Technique and Development. Technical Bulletin.
Citazione stile Chigago Style (17a edizione)Roy, Ashok. "The National Gallery Van Dycks: Technique and Development." Technical Bulletin 1999.
Citatione MLA (8a ed.)Roy, Ashok. "The National Gallery Van Dycks: Technique and Development." Technical Bulletin, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.