Routledge, 2003
Buku Teks
Victoria University of Wellington, 2007
Buku Teks
Buku Teks
Allan B. I. Bernardo; Cecilia Gastardo- Conaco; Maria Emma Concepcion Liwag, editor
Kyoyook-Kwaha-Sa Publishing Company, 2007
Buku Teks
Sage Publications, 1988
Buku Teks