Uhlin, U. (1994). The three-dimensional structure of ribonucleotide reductase protein R1 from Esherichia coli. Swedish University of Agricultural Sciences, Dept. of Molecular Biology.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Uhlin, Ulla. The Three-dimensional Structure of Ribonucleotide Reductase Protein R1 from Esherichia Coli. Uppsala, Sweden: Swedish University of Agricultural Sciences, Dept. of Molecular Biology, 1994.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Uhlin, Ulla. The Three-dimensional Structure of Ribonucleotide Reductase Protein R1 from Esherichia Coli. Swedish University of Agricultural Sciences, Dept. of Molecular Biology, 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.