Fox, Karl August, 1917-
John Wiley & Sons, 1968
Buku Teks SO
Mirer, Thad W.
Macmillan, 1990
Buku Teks SO
John Wiley & Sons, 1954
Buku Teks
edited by Matias D. Cattaneo, Juan Carlos Escanciano
Emerald, 2017
eBooks
Klein, Lawrence R.
Basil-Blackwell, 1985
Buku Teks SO