Brooker, Graeme
Laurence King, 2013
Buku Referensi
Grattan, C. Hartley
The University of Michigan Press, 1963
Buku Teks
Barck, Oscar Theodore, Jr., 1902-1993
Macmillan, 1965
Buku Teks
edited by K. Michael Hays
MIT Press, 1998
Buku Teks
Heale, M. J.
An imprint of Bloomsbury Publishing Plc, 2015
Buku Teks