ebrary, Inc, Tukker, A., & Tischner, U. (2006). New business for old Europe: Product-service development, competitiveness and sustainability. Greenleaf Pub..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)ebrary, Inc, Arnold Tukker, و Ursula Tischner. New Business for Old Europe: Product-service Development, Competitiveness and Sustainability. Sheffield, South Yorkshire, England: Greenleaf Pub., 2006.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)ebrary, Inc, et al. New Business for Old Europe: Product-service Development, Competitiveness and Sustainability. Greenleaf Pub., 2006.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.