APA (7 वां संस्करण) प्रशस्ति पत्र
Hamann, R., Sprague, C., & Woolman, S. (2008). The business of sustainable development in Africa: Human rights, partnership, alternative business models. Unisa Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Hamann, Ralph, Courtenay Sprague, और Stu Woolman. The Business of Sustainable Development in Africa: Human Rights, Partnership, Alternative Business Models. Pretoria: Unisa Press, 2008.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Hamann, Ralph, et al. The Business of Sustainable Development in Africa: Human Rights, Partnership, Alternative Business Models. Unisa Press, 2008.
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