Ropper, Allan H.
McGraw-Hill, 2014
Buku Teks
Vroom, Victor H.
John Wiley & Sons, 1964
Buku Teks
Buell, Victor P., author
Pan Books, [date of publication not identified]
Buku Teks
Ficker, Victor B.
Charles E. Merrill, 1975
Buku Teks
Anderson, Victor
Routledge, 1993
Buku Teks