APA (7th ed.) Citation

Gladstone, W. E., Foot, M. R. D., & Gray, H. C. (1994). The Gladstone diaries. Clarendon Press.

Chicago Style (17th ed.) Citation

Gladstone, William Ewart, Michael R. D. Foot, and Henry Colin Gray. The Gladstone Diaries. Oxford: Clarendon Press, 1994.

MLA (9th ed.) Citation

Gladstone, William Ewart, et al. The Gladstone Diaries. Clarendon Press, 1994.