Bawengan, Gerson W.
Pradnya Paramita, 1991
Buku Teks
Hagan, Frank E.
Sage Publications, 2010
Buku Teks
Godwin, Grover Maurice
CRC Press, 2000
Buku Teks
Reid, Sue Titus
Holt, Rinehart and Winston, 1985
Buku Teks
Savitz, Leonard D.
John Wiley & Sons, 1978
Buku Teks