APA (7th ed.) Citation

Sackville-West, V., & Nicolson, N. (1974). Portrait of a marriage. Futura.

Chicago Style (17th ed.) Citation

Sackville-West, V., and Nigel Nicolson. Portrait of a Marriage. London: Futura, 1974.

MLA (8th ed.) Citation

Sackville-West, V., and Nigel Nicolson. Portrait of a Marriage. Futura, 1974.

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