Cita APA (7th ed.)

North York Board of Education (Ont.). (1969). Conceptual schemes: Our science program (Rev. ed.). The Board.

Cita Chicago (17th ed.)

North York Board of Education (Ont.). Conceptual Schemes: Our Science Program. Rev. ed. North York, Ont.: The Board, 1969.

Cita MLA (8th ed.)

North York Board of Education (Ont.). Conceptual Schemes: Our Science Program. Rev. ed. The Board, 1969.