Cita APA (7th ed.)

Percival, F., & Ellington, H. (1988). A handbook of educational technology (2nd ed.). Kogan Page.

Cita Chicago (17th ed.)

Percival, Fred, i Henry Ellington. A Handbook of Educational Technology. 2nd ed. London: Kogan Page, 1988.

Cita MLA (9th ed.)

Percival, Fred, i Henry Ellington. A Handbook of Educational Technology. 2nd ed. Kogan Page, 1988.