Trump, Ross M.
Houghton Mifflin , 1966
Buku Teks
Frank, William W.
Macmillan, 1959
Buku Teks
Webber, Ross A.
Richard D. Irwin, 1981
Buku Teks
Lapp, Charles L.
McGraw-Hill, 1957
Buku Teks
Pool, John Charles
Massachussetts cAddsion-Wesley 21 cm., 1985
Buku Teks