Roy, James A. Le
Houghton Mifflin, 1914.
Buku Teks
Greg Soetomo
Kanisius, 1998
Buku Teks
Nadeak, Kustigar, author
Pustaka Sianar Harapan, 1986
Buku Teks
Roy, James A. Le
Filipiniana Book Guild, 1968
Buku Teks
Jordan, Winthrop D., author
McDaugal, Littell, 1992
Buku Teks