Kimbrough, Vickie J.
Pearson, Prentice Hall, 2006
Buku Teks SO
Pollack, Robert L.
Lea & Febiger , 1985
Buku Teks SO
by Walter J. Pelton ...[et al.]
Harvard University Press, 1969
Buku Teks SO
Berg, Joel H.
Wiley Blackwell, 2009
Buku Teks SO
William V. Giannobile, Brian A. Burt, Robert J. Genco
Blackwell, 2010
Buku Teks SO