Knowles, David, author
At University Press, 1963
Buku Teks
Park Jung Ja
Seoul : Korea, 2000
Buku Teks
Llamzon, Teodore A., author
Martinus Nijhoff, 1969
Buku Teks
edited by E. F. Bozman
J. M. Dent & Sons, 1958
Buku Referensi
Rosen, Jane L., author
Anchor Books, 2016
Buku Teks