edited by S.P. Aiyar and R. Srinivasan
Allied Publisher Private Limited, 1965
Buku Teks SO
Bowman, Larry W.
Westview Press, 1991
Buku Teks SO
Ghoshal, U.N.
Orient Longmans, 1957
Buku Teks SO
edited by Robert Chapman and Keith Sinclair
Pauls Book Arcade for the University of Auckland, 1963
Buku Teks SO
Moore, R J
Oxford University Press, 1988
Buku Teks SO