Yu, K., 유기영, & Sŏul Sijŏng Kaebal Yŏnʼguwŏn. (2011). Sŏul-si saenghwal p'yegimul sujip, unban taehaeng ch'egye kaesŏn pangan =: Improvement in contracting-out system for solid waste collection in Seoul : 2011. Sŏul Sijŏng Kaebal Yŏn'guwŏn.
Chicago Style (17th ed.) CitationYu, Ki-yong, 유기영, and Sŏul Sijŏng Kaebal Yŏnʼguwŏn. Sŏul-si Saenghwal P'yegimul Sujip, Unban Taehaeng Ch'egye Kaesŏn Pangan =: Improvement in Contracting-out System for Solid Waste Collection in Seoul : 2011. Sŏul T'ŭkpyŏlsi: Sŏul Sijŏng Kaebal Yŏn'guwŏn, 2011.
MLA (8th ed.) CitationYu, Ki-yong, et al. Sŏul-si Saenghwal P'yegimul Sujip, Unban Taehaeng Ch'egye Kaesŏn Pangan =: Improvement in Contracting-out System for Solid Waste Collection in Seoul : 2011. Sŏul Sijŏng Kaebal Yŏn'guwŏn, 2011.