Peck, Roxy., author
Cebgage Learning, 2016
Buku Teks
Erickson, Bonnie H.
Keynes The Open Univ. Press, 1977
Buku Teks
Mosteller, Frederick, author
Addison Wesley Publ., 1983
Buku Teks
Vellemen, Paul F.
Duxbury Press, 1981
Buku Teks
Devore, Jay L..
Duxbury Press, 1995
Buku Teks