Moriarty, Sandra E. (Sandra Ernst)
Prentice Hall International, 1991
Buku Teks
Sandage, C.H.
Richard D. Irwin, 1960
Buku Teks
Hotchkiss, George Burton
Alexander Hamilton Institute , 1961
Buku Teks
Wells, William D.
Prentice-Hall, 2000
Buku Teks
Weilbacher, William M
Macmillan, 1979
Buku Teks