Cita APA (7th ed.)

Valett, R. E. (1978). Developing cognitive abilities: Teaching children to think. Mosby.

Cita Chicago (17th ed.)

Valett, Robert E. Developing Cognitive Abilities: Teaching Children to Think. St. Lous: Mosby, 1978.

Cita MLA (9th ed.)

Valett, Robert E. Developing Cognitive Abilities: Teaching Children to Think. Mosby, 1978.