توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

ebrary, Inc, Skepticism from the Renaissance to the Enlightenment : a conference in memory of Richard H. Popkin (1923-2005), Maia Neto, J. R., Paganini, G., & Laursen, J. C. (2009). Skepticism in the modern age: Building on the work of Richard Popkin. Brill.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

ebrary, Inc, Skepticism from the Renaissance to the Enlightenment : a conference in memory of Richard H. Popkin (1923-2005), José Raimundo Maia Neto, Gianni Paganini, و John Christian Laursen. Skepticism in the Modern Age: Building on the Work of Richard Popkin. Leiden [Netherlands] ; Boston: Brill, 2009.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

ebrary, Inc, et al. Skepticism in the Modern Age: Building on the Work of Richard Popkin. Brill, 2009.