توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Lewis, H. D. (1969). The elusive mind: Based on the first series of the Gifford lectures delivered in the University of Edinburgh, 1966-68. Allen & Unwin.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Lewis, Hywel David. The Elusive Mind: Based on the First Series of the Gifford Lectures Delivered in the University of Edinburgh, 1966-68. London: Allen & Unwin, 1969.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Lewis, Hywel David. The Elusive Mind: Based on the First Series of the Gifford Lectures Delivered in the University of Edinburgh, 1966-68. Allen & Unwin, 1969.