Eleanor O'Leary.
Wiley-Blackwell, 2013
Buku Teks
Verne, Jules
[publisher not identified], [date of publication not identified]
Buku Klasik
Mintzber, Henry
Prentice-Hall, 1983
Buku Teks
Beziau, Jean-Yves, editor
[Springer , ], 2012
eBooks
Faroqhi, Suraiya, 1941-
I.B. Tauris, 2016
Buku Teks