Gaya APA
Frankena, W, K. (1976).
Perspectives on morality. Essays, ed. by K.E.Goodpaster. .
Notre Dame dsl:
University of Notre Dame Press.
Gaya MLA
Frankena, William, K..
"Perspectives on morality. Essays, ed. by K.E.Goodpaster. ".
Notre Dame dsl:
University of Notre Dame Press,
1976.
Buku.