- Du Plessis, Izak David,
Du Plessis, Izak David, 1900-1981 (Nombre personal)
- Du Plessis, I. D. (Izak David), 1900-1981
- Plessis, Izak David du, 1900-1981
His Ballades ... 1938.
His Tales from the Malay Quarter, 1981: t.p. (I. D. du Plessis)
Suid-Afrikaanse Biografiese Woordeboek, Vol. V, 1987: p. 231 (b. Philipstown, June 25, 1900; d. Cape Town, Dec. 11, 1981)
Doederomandro en ander kaapse stories, c1970: t.p. (I.D. du Plessis)
Coloured people belong to the West, 1960: t.p. (Dr. I.D. Du Plessis; Secretary for Coloured Affairs)
Storiewerf website, viewed Mar. 31, 2014 (ID du Plessis (1900-1981); Izak David du Plessis; best known as a poet of the "geslag van Dertig" (family of Thirty); also wrote young adult novels; studied at Univ. of Cape Town; B.Ed. 1925; lecturer in Afrikaans 1928-1931, Kaapse Tegniese Kollege; after MA 1931, taught at the University of Cape Town; in 1948 became head of the Instituut vir Maleise Studies; his doctorate is on the contribution of the Cape Malay to African folk song; became Commissioner of Coloured Affairs in 1951, Secretary of Coloured Affairs in 1960; involved in establishment of the University of the Western Cape in 1961, chancellor 1970)