APA (7th ed.) Citation

Okoń, W., & Wilgocka-Okon, B. (1973). The school readiness project. Unesco.

Chicago Style (17th ed.) Citation

Okoń, Wincenty, and Barbara Wilgocka-Okon. The School Readiness Project. Paris: Unesco, 1973.

MLA (9th ed.) Citation

Okoń, Wincenty, and Barbara Wilgocka-Okon. The School Readiness Project. Unesco, 1973.