Cita APA (7th ed.)

Ocran, E. B. (1974). Outline history of classification: An essay. Educational Resources Information Center.

Cita Chicago (17th ed.)

Ocran, Emanuel Benjamin. Outline History of Classification: An Essay. Washington, D. C.: Educational Resources Information Center, 1974.

Cita MLA (8th ed.)

Ocran, Emanuel Benjamin. Outline History of Classification: An Essay. Educational Resources Information Center, 1974.