Naesŏngchŏgin saram i kang hada
Subtitle: "sŏngkyŏk munje" ŭi hŏ wa sil
By: Yi Si-hyŏng
Publisher: Chiphyŏnjŏn
Published: 1986
Place of publication: Sŏul Tʻŭkpyŏlsi
Language: kor
Number of pages: 284
Subjects: Personality assessment; Introversion