Herrmann, Norbert, author
Springer, 2012
eBooks
Wheeler, Ruric E., author
John Wiley & Sons, 1979
Buku Teks SO
Miller, Charles D., author
Scott, Foresman and Co., 1978
Buku Teks
Bergamini, David, author
Time Incorporated, 1963
Buku Referensi
Collier, Leonard Dawson, author
St. Paul's House Warwick Lane, 1973
Buku Teks