M. Ikhsan Modjo
UNDP, [ tt ]
Buku Referensi
Shim, Jae K.
Prentice-Hall, 1996
Buku Referensi
Jones, Reginald L.
Taraporevala, 1966
Buku Teks
Banks, Alan
McGraw-Hill, 2008
Buku Teks SO
edited by Niamh Moloney, Eilis Ferran; Jennifer Payne
Oxford University Press, 2015
Buku Teks