Gaya APA
Sidgwick, H.
(1960).
Outlines of the history of ethics for English readers.
.
London dsl:
Macmillan dsl.
Gaya MLA
Sidgwick, Henry.
"Outlines of the history of ethics for English readers. ".
London dsl:
Macmillan dsl,
1960.
Buku.