APA (7th ed.) Citation

Nicolson, H., & Olson, S. (1980). Diaries and letters, 1930-1964 (1st American ed.). Atheneum.

Chicago Style (17th ed.) Citation

Nicolson, Harold, and Stanley Olson. Diaries and Letters, 1930-1964. 1st American ed. New York: Atheneum, 1980.

MLA (9th ed.) Citation

Nicolson, Harold, and Stanley Olson. Diaries and Letters, 1930-1964. 1st American ed. Atheneum, 1980.