Computer Systems Laboratory (U.S.) & Over, P. (1995). Z39.50 implementation experiences. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology ; For sale by the Supt. of Docs., U.S. G.P.O..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Computer Systems Laboratory (U.S.) و Paul Over. Z39.50 Implementation Experiences. Gaithersburg, MD : Washington, DC: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology ; For sale by the Supt. of Docs., U.S. G.P.O., 1995.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Computer Systems Laboratory (U.S.) و Paul Over. Z39.50 Implementation Experiences. U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology ; For sale by the Supt. of Docs., U.S. G.P.O., 1995.