British Library & Barker, N. (1989). Treasures of the British Library. Abrams.
Cita Chicago Style (17a ed.)British Library e Nicolas Barker. Treasures of the British Library. New York: Abrams, 1989.
Cita MLA (8a ed.)British Library e Nicolas Barker. Treasures of the British Library. Abrams, 1989.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.