Plato
Pinguin Books, 1960
Buku Teks
Plato
Everyman's Library , 1992
Buku Teks
New Delhi, India : Indian Council for Cultural Relation
Majalah, Jurnal, Buletin
Radhakrishnan, S. (Sarvepalli), 1888-1975
George Allen and Unwin, 1930
Buku Teks
Fletcher, Sydney E.
Grosset & Dunlap, 1954
Buku Teks