Margenau, Henry
Time Incorporated, 1964
Buku Referensi
Arczewski, K.
Ellis Horwood , 1993
Buku Teks SO
edited by Kenneth J. Arrow, Samuel Karlin, and Patrick Suppes
Stanford University Press, 1960
Buku Teks SO
Chiang, Alpha C., 1927-
McGraw-Hill, 2005
Buku Teks SO
Wyld, H.W.
Benjamin/Cummings, 1979
Buku Teks SO