Oxford reference
Oxford University Press, 1990
Buku Referensi
Kurian, George Thomas, author
Amacom, 2013
Buku Referensi
Kurian, George Thomas, author
[American Management Association, ], 2013
eBooks
Bird, Roger
Sweet & Maxwell, 1983
Buku Teks
Fowler, H. W. (Henry Watson), 1858-1933, author
Buku Teks
Buku Referensi