Knowledge and devotion: the quintessence of Vedanta of Shri Shankara and the Bhakti Sutras of the divine Sage Narada - Poddāra, Hanumānaprasāda; Wenham-Prosser, Alan; Śaṅkara 788-820; Nārada; Tattwananda, Swami (Saraswati Society, 2013)