Hanssen, O. J. (1997). Sustainable industrial product systems: Integration of life cycle assessment in product development and optimisation of product systems. Stiftelsen Østfoldforskning.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hanssen, Ole Jørgen. Sustainable Industrial Product Systems: Integration of Life Cycle Assessment in Product Development and Optimisation of Product Systems. Fredrikstad ; Trondheim: Stiftelsen Østfoldforskning, 1997.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hanssen, Ole Jørgen. Sustainable Industrial Product Systems: Integration of Life Cycle Assessment in Product Development and Optimisation of Product Systems. Stiftelsen Østfoldforskning, 1997.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.