APA-viite (7. p.)

Sidgwick, H., & Widgery, A. G. (1949). Outlines of the history of ethics: For English readers / by Henry Sidgwick. With an additional chapter by Alban G. Widgery. Macmillan.

Chicago-viite (17. p.)

Sidgwick, Henry, ja Alban G. Widgery. Outlines of the History of Ethics: For English Readers / by Henry Sidgwick. With an Additional Chapter by Alban G. Widgery. London: Macmillan, 1949.

MLA-viite (8. p.)

Sidgwick, Henry, ja Alban G. Widgery. Outlines of the History of Ethics: For English Readers / by Henry Sidgwick. With an Additional Chapter by Alban G. Widgery. Macmillan, 1949.