Cita APA (7a ed.)

Foster, S., & Gayford, M. (2001). BP Portrait Award: 1990-2001 / Introductory essay by Martin Gayford. National Portrait Gallery.

Cita Chicago Style (17a ed.)

Foster, Susie, y Martin Gayford. BP Portrait Award: 1990-2001 / Introductory Essay by Martin Gayford. National Portrait Gallery. London, 2001.

Cita MLA (8a ed.)

Foster, Susie, y Martin Gayford. BP Portrait Award: 1990-2001 / Introductory Essay by Martin Gayford. National Portrait Gallery. 2001.