Gaya APA
Land, Geofrrey. (1990).
Business Reading .
Singapore:
Longman Group UK Ltd..
Gaya Chicago
Land, Geofrrey.
Business Reading.
Singapore:
Longman Group UK Ltd.,
1990.
Text.
Gaya MLA
Land, Geofrrey.
Business Reading.
Singapore:
Longman Group UK Ltd.,
1990.
Text.
Gaya Turabian
Land, Geofrrey.
Business Reading.
Singapore:
Longman Group UK Ltd.,
1990.
Print.