Hammonds, Carsie, 1894-
Mcgraw-Hill , 1950
Buku Teks
S. Venkataiah, editor
Anmol Publications, 2001
Buku Teks
Anmol Publications PVT, 2001
Buku Teks
Peters, Herman Jacob, 1917-
Macmillan, 1963
Buku Teks
edited by Susan Brindley
Routledge, 1993
Buku Teks