Gallian, Joseph A.
D.C. Heath, 1990
Buku Teks
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
Ehrlich, Gertrude
PWS-Kentt Publishing, 1991
Buku Teks