Gaya APA
Preston, PW. (1949).
Development Theory : An Introduction .
Massachussets:
Blackwell Publisher.
Gaya Chicago
Preston, PW.
Development Theory : An Introduction.
Massachussets:
Blackwell Publisher,
1949.
Text.
Gaya MLA
Preston, PW.
Development Theory : An Introduction.
Massachussets:
Blackwell Publisher,
1949.
Text.
Gaya Turabian
Preston, PW.
Development Theory : An Introduction.
Massachussets:
Blackwell Publisher,
1949.
Print.