Rugh, Roberts
Burgess, 1961
Buku Teks
Majumdar, N.N.
Tata McGraw-Hill, 1985
Buku Teks
Torrey, Theodore W.
John Wiley & Sons, 1979
Buku Teks
Assheton, Richard
University press, 2014
Buku Teks
Barth, Lester George
Holt Rinehart and Winston, 1953
Buku Teks