Gaya APA
Gurnsey, John. (1989).
Information Consultancy .
London:
Clive Bingley.
Gaya Chicago
Gurnsey, John.
Information Consultancy.
London:
Clive Bingley,
1989.
Text.
Gaya MLA
Gurnsey, John.
Information Consultancy.
London:
Clive Bingley,
1989.
Text.
Gaya Turabian
Gurnsey, John.
Information Consultancy.
London:
Clive Bingley,
1989.
Print.