edited by Linda A. Bennett
G.K. Hall, 1992
Buku Referensi
edited by C.A. Jacobson
Van Nostrand Reinhold, 1959
Buku Referensi
Macmillan Publishing Company, 1987
Buku Referensi
Pandey, A.K., author
Anmol Publications, 1992
Buku Referensi
edited by Vergilius Ferm
Littlefield, Adam and Co., 1959
Buku Referensi