Nutt, Merle Carlo
Pergamon Press, 1977
Buku Teks
Stevenson, Edward J., author
Noyes Data Corporation, 1977
Buku Teks
Swarup, D., author
Rakesh K. Rastogi for Rastogi, 1981
Buku Teks
Cottrell, Alan, author
ELBS/Edward Arnold, 1975
Buku Teks
Higgins, Raymond.A.
E. Arnold,, 1980
Buku Teks