정원철 Chŏng Wŏn-ch'ŏl. (2017). 고구려 산성 연구 Koguryŏ sansŏng yŏn'gu. Tongbuga Yŏksa Chaedan.
Chicago Style (17th ed.) Citation정원철 Chŏng Wŏn-ch'ŏl. 고구려 산성 연구 Koguryŏ Sansŏng Yŏn'gu. Korea: Tongbuga Yŏksa Chaedan, 2017.
MLA (8th ed.) Citation정원철 Chŏng Wŏn-ch'ŏl. 고구려 산성 연구 Koguryŏ Sansŏng Yŏn'gu. Tongbuga Yŏksa Chaedan, 2017.
Warning: These citations may not always be 100% accurate.