Cita APA (7th ed.)

Cropley, A. J. (1979). Lifelong education, a stocktaking. Unesco Institute for Education.

Cita Chicago (17th ed.)

Cropley, A. J. Lifelong Education, a Stocktaking. Hamburg: Unesco Institute for Education, 1979.

Cita MLA (8th ed.)

Cropley, A. J. Lifelong Education, a Stocktaking. Unesco Institute for Education, 1979.