APA (7th ed.) Citation

Collier, J. P., Trevelyan, W. C., & Trevelyan, C. E. (1968). Trevelyan papers .. Johnson Reprint.

Chicago Style (17th ed.) Citation

Collier, John Payne, Walter Calverley Trevelyan, and Charles Edward Trevelyan. Trevelyan Papers .. London: Johnson Reprint, 1968.

MLA (8th ed.) Citation

Collier, John Payne, et al. Trevelyan Papers .. Johnson Reprint, 1968.