Jossey-Bass, 2011
Buku Teks
Issel, L. Michele
Jones & Bartlett Learning, 2014
Buku Teks
Blum, Henrik L.
Human Science Press, 1981
Buku Teks SO
Reinke, William A.
John Hopkins University Press, 1972
Buku Teks
Spiegel, Allen D.
Ablex Publishing Corporation, 1991
Buku Referensi