Gaya APA
Bangs, D, H., Wibowo, H. (1994).
PEDOMAN PERENCANAAN USAHA : (The Business Planning Guide) .
Jakarta:
Erlangga.
Gaya MLA
Bangs, David, H.., Wibowo, Herman.
"PEDOMAN PERENCANAAN USAHA : (The Business Planning Guide)".
Jakarta:
Erlangga,
1994.
Text.