Holz, Robert K.
John Wiley & Sons, 1985
Buku Teks SO
Robinson, I.S.
John Wiley & Sons, 1994
Buku Teks SO
Siamak Khorram, Cynthia F. van der Wiele, Frank H. Koch, Stacy A. C. Nelson, Matthew D. Potts
Springer, 2016
Buku Teks SO
Campbell, James B., 1944-
Guilford Press, 2011
Buku Teks SO
edited by John E. Estes and Leslie W. Senger
Hamilton, 1974
Buku Teks SO