Beckwith, C. I. (2004). Koguryo, the Language of Japan's Continental Relatives: An Introduction to the HistoricalComparative Study of the Japanese Koguryoic Languages with a Preliminary Description of Archaic Northeastern Middle Chinese. Brill Academic Publishers.
Cita Chicago Style (17a ed.)Beckwith, Christopher I. Koguryo, the Language of Japan's Continental Relatives: An Introduction to the HistoricalComparative Study of the Japanese Koguryoic Languages with a Preliminary Description of Archaic Northeastern Middle Chinese. Leiden: Brill Academic Publishers, 2004.
Cita MLA (8a ed.)Beckwith, Christopher I. Koguryo, the Language of Japan's Continental Relatives: An Introduction to the HistoricalComparative Study of the Japanese Koguryoic Languages with a Preliminary Description of Archaic Northeastern Middle Chinese. Brill Academic Publishers, 2004.