Hanguk Kukche Kyoryu Chaedan
Seoul Selection, 2011
Buku Teks SO
Chichester, Francis Sir
Ballantine Books, 1964
Buku Teks SO
Departhemen of Geography University of Waterloo, 2005
Buku Teks SO
edited by Bruce Allen and Yuki Masami
Lexington Books, 2016
Buku Teks SO
Aiu Ahra
Gramedia Pustaka Utama, 2016
Buku Teks