Gaya APA

Gale, F, L., Swanson, C, P. (NULL). Determining the requirements for the design of learner-based instruction . Ohio:: Ohio: Charles E. Merrill; 1975.

Gaya MLA

Gale, Fred, L.., Swanson, Carl, P.. "Determining the requirements for the design of learner-based instruction". Ohio:: Ohio: Charles E. Merrill; 1975, NULL. Text.