Lee, U-phyong
Jirig yosa Lee U-pyong ui Hanguk jihyong sanchaek I = (Geography teacher Yiwu square meters) walking terrain Korea 0.2: up even in Baengnyeongdo Lee U-phyong
Prunsoop, 2008
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Yi, Sung-ho, 1961-
Hanguk ui kihu & munhwa sanchaek
Purun Kil , 2009
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Horvath, Agnes, 1957-
Walking into the void : a historical sociology and political anthropology of walking
Routledge, 2018
 Buku Teks SO
Samuelson, Paul Anthony, 1915-2009
Economics
McGraw-Hill, 2010
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Sloman, John
Economics
Harvester Wheatsheaf, 1994
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