APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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