Old, R. W., & Primrose, S. B. (1989). Principles of gene manipulation: An introduction to genetic engineering (4th ed.). Blackwell Scientific Publications Distributors, USA, Publishers Business Services.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Old, R. W., و S. B. Primrose. Principles of Gene Manipulation: An Introduction to Genetic Engineering. 4th ed. Oxford [England], Boston, Brookline, Mass: Blackwell Scientific Publications Distributors, USA, Publishers Business Services, 1989.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Old, R. W., و S. B. Primrose. Principles of Gene Manipulation: An Introduction to Genetic Engineering. 4th ed. Blackwell Scientific Publications Distributors, USA, Publishers Business Services, 1989.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.