Lauer, Robert H.
McGraw-Hill, 2012
Buku Teks SO
Duval, Evelyn Millis
Harper & Row, 1985
Buku Teks SO
Duvall, Evelyn Ruth Millis
Lippincott, 1977
Buku Teks SO
Hale, Robert D.
W.W. Norton , 1990
Buku Teks SO
Parsons, Talcott
Routledge & Kegan Paul, 1956
Buku Teks SO