Mansell, 1981
Buku Teks
Theodoulou, Stella Z., author
Thomson, 2004
Buku Teks
Preager, 1986
Buku Teks
Stopher, Peter R.
Edward Elgar Publishing Limited, 2016
Buku Teks
edited by Adam Szirmai, Wim Naudé and Ludovico Alcorta
Oxford University Press, 2017
Buku Teks