Gaya APA
Ramsey, J, E., Bittel, L, R. (1985).
Encyclopedia of professional management second edition volume 1 (-).
United States of Amerika:
Grolier International.
Gaya MLA
Ramsey, Jackson, Eugene., Bittel, Lester, Robert.
"Encyclopedia of professional management second edition volume 1".
-
United States of Amerika:
Grolier International,
1985.
UMUM.