Não informado. (1971). Instructional technology. Girard Associates.
Style de citation Chicago (17e éd.)Não informado. Instructional Technology. Arlington, NJ: Girard Associates, 1971.
Style de citation MLA (8e éd.)Não informado. Instructional Technology. Girard Associates, 1971.
Attention : ces citations peuvent ne pas être correctes à 100%.