APA (7th ed.) Citation

National Portrait Gallery (London). (2004). Complete illustrated catalogue. Unicorn Press [u.a.].

Chicago Style (17th ed.) Citation

National Portrait Gallery (London). Complete Illustrated Catalogue. London: Unicorn Press [u.a.], 2004.

MLA (9th ed.) Citation

National Portrait Gallery (London). Complete Illustrated Catalogue. Unicorn Press [u.a.], 2004.

Warning: These citations may not always be 100% accurate.