Gabriel, Ralph Henry, 1890-1987, author
D. Appleton-Century, 1942
Buku Teks
Muccigrosso, author
Krieger publishing company, 2001
Buku Teks
Sievers, Sharon L.
Stanford University Press, 1983
Buku Teks
Charles E. Tuttle Company, 1988
Buku Teks
Umegaki, Michio
New York University press, 1988
Buku Teks