Gaya APA
Cotton, David, Robbins, Sue. (1993).
Business class .
London:
Nelson.
Gaya Chicago
Cotton, David, Robbins, Sue.
Business class.
London:
Nelson,
1993.
Text.
Gaya MLA
Cotton, David, Robbins, Sue.
Business class.
London:
Nelson,
1993.
Text.
Gaya Turabian
Cotton, David, Robbins, Sue.
Business class.
London:
Nelson,
1993.
Print.