Gaya APA

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

Gaya MLA

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