Srinivasan, N.K., author
New Delhi: Oxford and IBH, 1983
Buku Teks
Meier, Michael L.
Pearson Education, 2005
Multimedia
Meier, Michael L.
2005
Multimedia
Timings, R.L. (Roger Leslie), 1927-, author
Longman Scientific, 1989
Buku Teks
Timings, R.L. (Roger Leslie), 1927-, author
Longman, 1991
Buku Teks