Hearder, H.
Holt, Rinehart and Winston , 1966
Buku Teks
Anderson, Eugene N.
USA Bobbs-Merrill 1961
Buku Teks
Croce, Benedetto
Allen & Unwin, 1953
Buku Teks
Cairns, John C.
Free Press, 1965
Buku Teks
edited by Stanley J. Kunitz, Howard Haycraft
Wilson, 1936
Buku Referensi