Cita APA (7th ed.)

Hopper, E. (1971). Readings in the theory of educational systems. Hutchison Univ. Library.

Cita Chicago (17th ed.)

Hopper, Earl. Readings in the Theory of Educational Systems. London: Hutchison Univ. Library, 1971.

Cita MLA (9th ed.)

Hopper, Earl. Readings in the Theory of Educational Systems. Hutchison Univ. Library, 1971.