Khan, Fazl-Ullah, author
Board of Economic Enquiry, 1964
Buku Teks
Creutzberg, Pieter, author
Wolters-Noordhoff, 1972
Buku Teks
Boehm, E.A., author
Longman Chesire, 1979
Buku Teks
Boehm, E.A., author
Longman, 1971
Buku Teks
Kunio, Yoshihara, author
Oxford University Press, 1994
Buku Teks