APA (7th ed.) Citation

Easton, M., John, A., & John, R. (1975). Augustus John. H.M.S.O..

Chicago Style (17th ed.) Citation

Easton, Malcolm, Augustus John, and Romilly John. Augustus John. London: H.M.S.O., 1975.

MLA (8th ed.) Citation

Easton, Malcolm, et al. Augustus John. H.M.S.O., 1975.