editor Ratna Sahai
Thonson Press, 1993
Buku Teks
Harman, S., author
DL Publication, 1977
Buku Teks
Manohar Publishers & Distributors, 2007.
Buku Teks
Majul, Cesar A., author
The University of The Philippines Press, 1973
Buku Teks
Majul, Cesar A., author
University of the Philippines Press, 1999
Buku Teks