Roberts, Larry S., 1935-
McGraw-Hill, 2013
Buku Teks
Cable, Raymond M.
Burgess, 1958
Buku Teks
by Elmer R. Noble ... [and others]
Lea & Febiger, 1989
Buku Referensi
Chandler, Asa C.
John Wiley & Sons, 1961
Buku Teks
Craig, Charles Franklin
Lea & Febiger, 1951
Buku Teks