توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Othman Omar. (1979). The enzyme UDP-Galactose-4-Epimerase from E. Coli: Kinetic studies in relation to pH and a survey of the effects of chemical modifications upon activity. University of Sheffield.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Othman Omar. The Enzyme UDP-Galactose-4-Epimerase from E. Coli: Kinetic Studies in Relation to PH and a Survey of the Effects of Chemical Modifications upon Activity. Sheffield: University of Sheffield, 1979.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Othman Omar. The Enzyme UDP-Galactose-4-Epimerase from E. Coli: Kinetic Studies in Relation to PH and a Survey of the Effects of Chemical Modifications upon Activity. University of Sheffield, 1979.