Cortada, James W.
The quality yearbook 2000 edition
McGraw-Hill, 2000
 Buku Referensi
The library association yearbook 1994
Library Association Publishing, 1994
 Buku Referensi
The World of learning 1994 : forty-fourth edition
Europa Publications Limited, 1993
 Buku Referensi
Demographic yearbook : 1957, ninth issue = Annuaire demographique : 1957, neuvieme edition
United Nation. Departement of Economic and Social Affairs. Statistical Office
United Nation, 1957
 Buku Referensi
Korea annual 1994 : a comprehensive handbook on Korea, 31st annual edition
Yonhap News Agency, 1994
 Buku Referensi