Okay, Mehmet Orhan, 1931-2017. (Personal Name)

His Batı medeniyeti karşısında Ahmet Midhat Efendi, 1975: t.p. (Orhan Okay)

Türk. bibl., 1976: no. 1390 (Okay, Doç. Dr. [M.] Orhan)

LC in OCLC, 7/10/84 (hdg.: Okay, M. Orhan; usage: M. Orhan Okay)

Orhan Okay'a armağan, 1997: p. 43 (b. Jan. 26, 1931)