Wester, T. S. (1994). Polymerisation of ethene and propene with heterogeneous Ziegler-Natta catalysts: Transient comonomer effects on polymerisation kinetics. Institutt for uorganisk kjemi, Norges tekniske høgskole, Universitetet i Trondheim.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wester, Thale Sofie. Polymerisation of Ethene and Propene with Heterogeneous Ziegler-Natta Catalysts: Transient Comonomer Effects on Polymerisation Kinetics. Trondheim: Institutt for uorganisk kjemi, Norges tekniske høgskole, Universitetet i Trondheim, 1994.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Wester, Thale Sofie. Polymerisation of Ethene and Propene with Heterogeneous Ziegler-Natta Catalysts: Transient Comonomer Effects on Polymerisation Kinetics. Institutt for uorganisk kjemi, Norges tekniske høgskole, Universitetet i Trondheim, 1994.