Robertson, Barry C.
John Wiley & Sons, 1981
Buku Teks
Arya, Atam Parkash
Addison-Wesley, 1974
Buku Teks
Elby, Andrew, author
Prentice-Hall, 1996
Buku Teks
Gautreau, Ronald, author
McGraw-Hill, 1978
Buku Teks
by James A. Richards ... [et.al.]
Addison-Wesley, 1960
Buku Teks