Kungnip Chiriwŏn. (1987). 1: 50,000 chihyŏngdo. Kungnip Chiriwŏn.
Chicago Style (17th ed.) CitationKungnip Chiriwŏn. 1: 50,000 Chihyŏngdo. [Seoul]: Kungnip Chiriwŏn, 1987.
MLA (8th ed.) CitationKungnip Chiriwŏn. 1: 50,000 Chihyŏngdo. Kungnip Chiriwŏn, 1987.
Warning: These citations may not always be 100% accurate.