Gaya APA

Seels, B, B., Richey, R, C. (1994). Instructional technology : the definition and domains of the field . Washington: Associaton for Educational.

Gaya MLA

Seels, Barbara, B.., Richey, Rita, C.. "Instructional technology : the definition and domains of the field". Washington: Associaton for Educational, 1994. Text.