Beckwith, C. I. (2004). Koguryo, the language of Japan's continental relatives: An introduction to the historical-comparative study of the Japanese Koguryoic languages with a preliminary description of Archaic northeastern Middle Chinese. Brill.
Cita Chicago Style (17a ed.)Beckwith, Christopher I. Koguryo, the Language of Japan's Continental Relatives: An Introduction to the Historical-comparative Study of the Japanese Koguryoic Languages with a Preliminary Description of Archaic Northeastern Middle Chinese. Boston: Brill, 2004.
Cita MLA (8a ed.)Beckwith, Christopher I. Koguryo, the Language of Japan's Continental Relatives: An Introduction to the Historical-comparative Study of the Japanese Koguryoic Languages with a Preliminary Description of Archaic Northeastern Middle Chinese. Brill, 2004.