APA (7th ed.) Citation

Campbell Lady. (1992). Diana in private: The princess nobody knows. St. Martin's Press.

Chicago Style (17th ed.) Citation

Campbell Lady. Diana in Private: The Princess Nobody Knows. New York: St. Martin's Press, 1992.

MLA (8th ed.) Citation

Campbell Lady. Diana in Private: The Princess Nobody Knows. St. Martin's Press, 1992.