See F. M. Müller, The Six Systems of Indian Philosophy (1899, repr. 1963); S. N. Das Gupta, History of Indian Philosophy (4 vol., 1922–55); S. Radhakrishnan and C. A. Moore, Source Book in Indian Philosophy (1957); K. H. Potter, Presuppositions of India's Philosophies (1963) and Guide to Indian Philosophy (1988); A. Embree, The Hindu Tradition (1972) and, with S. Hay, ed., Sources of Indian Tradition (2 vol., 1988).
