Patrick Leman, Andy Bremner, Ross D Parke, Mary Guavain
McGraw-Hill, 2012
Buku Teks
Liebert, Robert M., 1942-
Prentice-Hall, 1986
Buku Teks SO
Hurlock, Elizabeth Bergner, 1898-
Tata McGraw-Hill, 1979
Buku Teks SO
Upton, Penney
Learning Matters, 2011
Buku Teks SO
Miller, Patricia H.
Worth Publisher, 2002
Buku Teks SO