Cita APA (7a ed.)

Valsecchi, M., & O'Sullivan, F. (1963). National Gallery, London. Oldbourne Press.

Cita Chicago Style (17a ed.)

Valsecchi, Marco, y Firmin O'Sullivan. National Gallery, London. London: Oldbourne Press, 1963.

Cita MLA (9a ed.)

Valsecchi, Marco, y Firmin O'Sullivan. National Gallery, London. Oldbourne Press, 1963.