Smith, Jonathan D.H.
CRC Press, Taylor & Francis Group, 2009
Buku Teks
Whitelaw, Thomas A.
Blackie Academic & Professional, 1995
Buku Teks
Barnes, Wilfred E.
D. C. Hearth, 1963
Buku Teks
Pinter, Charles C.
McGraw-Hill, 1982
Buku Teks
Fraleigh, John B.
Addison-Wesley Publishing Co., 1994
Buku Teks