Gaya APA
Owen, Roger. (1992).
BBC business english .
London:
BBC.
Gaya Chicago
Owen, Roger.
BBC business english.
London:
BBC,
1992.
Text.
Gaya MLA
Owen, Roger.
BBC business english.
London:
BBC,
1992.
Text.
Gaya Turabian
Owen, Roger.
BBC business english.
London:
BBC,
1992.
Print.