China official annual report 1981
Hongkong Kingsway International Publications 1981
 Buku Referensi
Annual report and statement of accounts for the year ended 31st December, 1981 / Central Bank of Nigeria
Central Bank of Nigeria , 1982
 Buku Teks SO
The annual register: a record of world events 1981
edited by H.V. Hodson
Longman, 1982
 Buku Referensi
Annual Report 1999/World Bank
Washington, D.C. World Bank 1999,
 Buku Teks
UNICEF annual report 1994
United Nations Children`s Fund
UNICEF , 1994
 Buku Teks