Gaya APA
Greenaway, D., Tharakan, P. (1986).
Impercfect Competition and International Trade .
England:
The Harvester Press.
Gaya MLA
Greenaway, David., Tharakan, P.K.M.
"Impercfect Competition and International Trade".
England:
The Harvester Press,
1986.
Buku.