Rasmussen, O.D., author
Commercial Press, 1928
Buku Teks
Artikel Jurnal
Sandel, Michael J., author
Farrar, Staus and Giroux, 2010
Buku Teks
Mackie, Margaret, author
Angus and Robertson, 1970
Buku Teks
Japan Information Center consulat General of Japan at New York, 1988
Buku Teks