Goodman, Lenn E.
Routledge, 1992
Buku Teks SO
Garrett, Ginger, 1968-
NavPress Indonesia, 2007
Buku Teks SO
Wilber, Donald N.
Princeton University Press, 1955
Buku Teks SO
Frye, Richard N.
Henry Holt and Company, 1953
Buku Teks SO
Frye, Richard N.
Allen & Unwin , 1960
Buku Teks SO