Gregorian, Vartan
Stanford University press, 1969
Buku Teks
Lewis, Bernard, author
Oxford University Press, 1961
Buku Teks
Vickers, Adrian, 1958-, author
Cambridge University Press, 2013
Buku Teks
Minimum, 2010
Buku Teks
Huebner, Stefan, author
National University of Singapore (NUS Press), 2016
Buku Teks