Frye, Richard N.
Henry Holt and Company, 1953
Buku Teks
Frye, Richard N.
Allen & Unwin , 1960
Buku Teks
Wilber, Donald N.
Princeton University Press, 1955
Buku Teks
Wilber, Donald N.
Princeton University Press, 1958
Buku Teks
Bidgool, 2008
Buku Referensi