Swami Vivekananda (1935). “The Complete Works of the Swami Vivekananda, Comprising All His Lectures, Addresses and Discourses Delivered in Europe, America and India: All His Writings in Prose and Poetry, Together with Translations of Those Written in Bengali and Sanskrit; Reports of His Interviews and His Replies to the Various Addresses of Welcome; His Sayings and Epistles,--private and Public--original and Translated; with an Index; Carefully Revised & Edited”
Swami Vivekananda, Swami Adiswarananda (2006). “Vivekananda, World Teacher: His Teachings on the Spiritual Unity of Humankind”, p.89, SkyLight Paths Publishing