APA (7th ed.) Citation

Curtis, L. (1916). The problem of the Commonwealth. Macmillan.

Chicago Style (17th ed.) Citation

Curtis, Lionel. The Problem of the Commonwealth. Toronto [u.a.]: Macmillan, 1916.

MLA (9th ed.) Citation

Curtis, Lionel. The Problem of the Commonwealth. Macmillan, 1916.