Gilbert, Dorothy B., author
R.R.Bowker, [date of publication not identified]
Buku Teks
editor Joseph G. E.Hopkins
Charles Scribner's Sons, 1964
Buku Referensi
Sobel, Robert, author
Weybright and Talley, 1974
Buku Teks
Aguirre, Adalberto, author
McGraw-Hill, Higher Education, 2009
Buku Teks
edited by Stanley J. Kunitz and Howard Haycraft
H.W. Wilson, 1960
Buku Referensi