Francisco, Juan R., author
Linguistic Society of The Philippines, 1973
Buku Teks
Forbes, W. Cameron
Houghton Mifflin, 1928
Buku Teks
Reyess, Elizabeth, author
Tuttle Publishing, 2012.
Buku Teks
Kusch, Martin, author
Routledge, 1999
Buku Teks
Lee, E-Wha, author
Homa & Sekey Books, 2001
Buku Teks