Keegan, John
Routledge, 1996
Buku Referensi
Keegan, John
Routledge, 1996
Buku Referensi
Seth, Michael J.
Littlefield, 2011
Buku Teks
Black, Jeremy
Cambridge University Press, 1996
Buku Referensi
Melissa Calaresu; Danielle van den Heuvel.
Routledge, 2016
Buku Teks