Welch, Paul Smith, author
McGraw-Hill, 1948
Buku Teks
Sitorus, Laurent Renato, author
2014
UI - Skripsi (Membership)
Rubinstein, Reuven Y., author
John Wiley & Sons, 1981
Buku Teks
Braddick, H. J. J.
Chapman and Hall, 1966
Buku Teks
Reddy, J. N., author
McGraw-Hill, 1984
Buku Teks