Gaya APA
Davis, M, M.
(2003).
Managing Services
.
:
Mc Graw - Hil/Irwin.New York.
Gaya MLA
Davis, Mark, M.
"Managing Services".
:
Mc Graw - Hil/Irwin.New York,
2003.
Skripsi, Tesis, Disertasi.