Weston, J. Fred (John Fred), 1916-, author
ESG , 1981
Buku Teks
Weston, J. Fred (John Fred), 1916-, author
Holt, Rinehart and Winston, 1972
Buku Teks
Franks, J.R., author
John Wiley & Sons, 1979
Buku Teks
Weston, J. Fred (John Fred), 1916-, author
Erlangga , 1997
Buku Teks
Weston, J. Fred (John Fred), 1916-
Irwin , 1972
Buku Teks