APA (7th ed.) Citation

Sharp. (2019). Diplomacy in the 21st century: A brief introduction. Routledge.

Chicago Style (17th ed.) Citation

Sharp. Diplomacy in the 21st Century: A Brief Introduction. New York: Routledge, 2019.

MLA (8th ed.) Citation

Sharp. Diplomacy in the 21st Century: A Brief Introduction. Routledge, 2019.