1984, 8, JSTOR 23717695, S2CID 162384193, doi:10.1353/ks.1984.0011. * Hulbert, Homer B., A Comparative Grammar Of The Korean Language and the Dravidian Languages
2, E52. doi:10.1017/ehs.2020.49 Hulbert (1906),第28頁. sfnp error: no target: CITEREFHulbert1906 (help) Hulbert, Homer B. A Comparative Grammar Of The Korean