MLA

Closset, Ad. T. C. Dravidian Origin and Philosophy of the Human Speech. S.l: s.n., 1941.

APA

Closset, A. T. C. (1941). Dravidian origin and philosophy of the human speech. S.l: s.n.

Chicago

Closset, Ad. T. C. Dravidian Origin and Philosophy of the Human Speech. S.l: s.n., 1941.