Parker, Harry
John Wiley & Sons, 1983
Buku Teks SO
editor, Roger L. Brockenbrough, Frederick S. Maerritt
McGraw-Hill, 1994
Buku Referensi
Gorenc, B. (Branko)
New South Wales University Press, 1981
Buku Teks
Gorenc, B. (Branko)
UNSW Press, 1981
Buku Referensi
Salmon, Charles G.
Harper and Row, 1980
Buku Referensi