توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Gibson, W. R. B. (1904). A philosophical introduction to ethics: An advocacy of the spiritual principle in ethics from the point of view of personal idealism. S. Sonnenschein & Co., lim..

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Gibson, William Ralph Boyce. A Philosophical Introduction to Ethics: An Advocacy of the Spiritual Principle in Ethics from the Point of View of Personal Idealism. London: S. Sonnenschein & Co., lim., 1904.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Gibson, William Ralph Boyce. A Philosophical Introduction to Ethics: An Advocacy of the Spiritual Principle in Ethics from the Point of View of Personal Idealism. S. Sonnenschein & Co., lim., 1904.