Cita APA (7a ed.)

Smart, T., & Gibbon, D. (1988). The British Isles. Colour Library.

Cita Chicago Style (17a ed.)

Smart, Ted, y David Gibbon. The British Isles. Guildford: Colour Library, 1988.

Cita MLA (9a ed.)

Smart, Ted, y David Gibbon. The British Isles. Colour Library, 1988.