APA (7th ed.) Citation

National Gallery, Cirlot, L., & Pou, A. (2006). National Gallery. Centro Editor PDA.

Chicago Style (17th ed.) Citation

National Gallery, Lourdes Cirlot, and Anna Pou. National Gallery. [Barcelona]: Centro Editor PDA, 2006.

MLA (9th ed.) Citation

National Gallery, et al. National Gallery. Centro Editor PDA, 2006.