Peterson's the Innovative Leader in College Guides
Peterson's, 1997
Buku Referensi
Croteau, David, author
Sage, 2022
Buku Teks
Lauterpacht, Hersch, Sir, 1897-1960
Stevens, 1958
Buku Teks
G & C Merriam Co., 1951
Buku Referensi
Hanguk kagok
Kukhak Charyown, 2011
Buku Teks