Day, A. J., & Hoffman, V. (1989). The annual register: A record of world events, 1988. Longman.
Chicago-čujuhus (17. p.)Day, Alan J., juo Verena Hoffman. The Annual Register: A Record of World Events, 1988. Essex, England: Longman, 1989.
MLA-čujuhus (9. p.)Day, Alan J., juo Verena Hoffman. The Annual Register: A Record of World Events, 1988. Longman, 1989.
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