Hanson, James A.
Springer-Verlag, 1971
Buku Teks SO
Kunkel, John H.
Oxford University Press, 1970
Buku Teks SO
edited by Giulia Mennillo, Thomas Schlenzig and Elmar Friedrich
Springer, 2012
eBooks
Sherman, Howard J.
Appleton-Century-Crofts, 1964
Buku Teks
Kaldor, Nicholas
Gerald Duckworth, 1960
Buku Teks SO