APA

E.U.A. Federal Old-Age and Survivors Insurance and Disability Insurance Trust Funds, . (1991). The 1991 annual report of the Board of Trustees of the Federal Old-age and Survivors Insurance and the Federal Disability Insurance Trust Funds. Communication from the Board. Washington, D.C: Government Printing Office.

Chicago

E.U.A. Federal Old-Age and Survivors Insurance and Disability Insurance Trust Funds, . 1991. The 1991 annual report of the Board of Trustees of the Federal Old-age and Survivors Insurance and the Federal Disability Insurance Trust Funds. Communication from the Board. Washington, D.C: Government Printing Office.

Harvard

E.U.A. Federal Old-Age and Survivors Insurance and Disability Insurance Trust Funds, . (1991). The 1991 annual report of the Board of Trustees of the Federal Old-age and Survivors Insurance and the Federal Disability Insurance Trust Funds. Communication from the Board. Washington, D.C: Government Printing Office.

MLA

E.U.A. Federal Old-Age and Survivors Insurance and Disability Insurance Trust Funds, . The 1991 annual report of the Board of Trustees of the Federal Old-age and Survivors Insurance and the Federal Disability Insurance Trust Funds. Communication from the Board. Washington, D.C: Government Printing Office. 1991.