Nicoll, William, author
Harvester Wheatsheaf, 1994
Buku Teks
Sihombing, Mangaratua, author
Fakultas Hukum Universitas Indonesia, 2014
UI - Skripsi Membership
Dodd, Mead & Co. , 1964
Buku Teks
Daltrop, Anne, author
Longman, 1982
Buku Teks
World Trade Organization
WTO, 2008
Buku Teks