Sharmila Vali Narayan, author
MPH Group Publishing Sdn Bhd, 2011
Buku Referensi
Kleiman, Carol, author
Lippincott & Crowell, 1980
Buku Teks
Collins, V.D., author
J.B. Lippincott, 1935
Buku Teks
Michael G. Grantham, editor
Routledge, 2011
Buku Teks
Becker, Norman, author
McGraw-Hill, 2011
Buku Teks