Turner, Jeffrey S.
Holt, Rinehart and Winston, 1987
Buku Teks
Turner, Jeffrey S.
Harcourt Brace College, 1995
Buku Teks
Berk, Laura E.
Allyn and bocon , 2001
Buku Teks
Dacey, John S.
McGraw-Hill, 2002
Buku Teks
Dacey, John S.
McGraw-Hill, 2002
Buku Teks