APA (7th ed.) Citation

Hong Sung Un. (1990). Economic development in the Democratic People's Republic of Korea. s.n.

Chicago Style (17th ed.) Citation

Hong Sung Un. Economic Development in the Democratic People's Republic of Korea. Pyongyang, Korea: s.n, 1990.

MLA (9th ed.) Citation

Hong Sung Un. Economic Development in the Democratic People's Republic of Korea. s.n, 1990.

Warning: These citations may not always be 100% accurate.