Atkinson, Leslie D.
Macmillan, 1985
Buku Teks SO
Brill, Esther Levine
Appleton-Century-Crofts , 1986
Buku Teks SO
Monica, Elaine L.
Addison-Wesley, 1979
Buku Teks
Kee, Joyce LeFever
W.B. Saunders , 1993
Buku Teks SO
Lynn, Pamela Barbara, 1961-
Wolters Kluwer/Lippincott Williams & Wilkins, 2011
Buku Teks SO