Darwin, Charles Robert
New York Henry Schuman 1950
Buku Teks
Hyde, Simeon
Addison-Wesley Publishing Company, Inc., 1967
Buku Teks SO
Portnoy, Ethel
Meulenhoff, 1998
Buku Teks
edited by Leslie A. Fiedler
Thomas Y. Crowell, 1958
Buku Teks SO
Roek, Jan de
Pink Editions & Productions, 1980
Buku Teks