[publisher not identified], 2000
Buku Teks
Silberling, Norman J., author
McGraw-Hill, 1943
Buku Teks
Yamamura, Kozo, author
University of California Press, 1967
Buku Teks
Oxford University Press , 1993
Buku Teks
World Bank
Oxford University Press for the World Bank, 1993
Buku Teks