APA (7th ed.) Citation

Barber. (1979). Diplomacy: The world of the honest spy. British Library, Reference Division Publications.

Chicago Style (17th ed.) Citation

Barber. Diplomacy: The World of the Honest Spy. London: British Library, Reference Division Publications, 1979.

MLA (8th ed.) Citation

Barber. Diplomacy: The World of the Honest Spy. British Library, Reference Division Publications, 1979.

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