Charles Scribner's Sons, 1976
Buku Referensi
Walters, Margan L
N.Y.Holt,Rinehart and winston,ic, 1966
Buku Teks
edited by Stanley J. Kunitz and Howard Haycraft
H.W. Wilson, 1960
Buku Referensi
Makkai, Adam
Barrons, 1995
Buku Teks
edited by Robert Richards
Littlefield, Adams, 1955
Buku Referensi