APA (7th ed.) Citation

Sidgwick, H. (1888). Outlines of the history of ethics: For English readers (2. ed.). Macmillan.

Chicago Style (17th ed.) Citation

Sidgwick, Henry. Outlines of the History of Ethics: For English Readers. 2. ed. London [u.a.]: Macmillan, 1888.

MLA (9th ed.) Citation

Sidgwick, Henry. Outlines of the History of Ethics: For English Readers. 2. ed. Macmillan, 1888.