Gaya APA

Swanson, C, P., Ray, I, U, D, I, M. (NULL). The encyclopaedia of educational media communications and technology . Westport:: Westport: Green Press; 1978.

Gaya MLA

Swanson, Carl, P.., Ray, I., Unwin,, Derick, II., McAleese,. "The encyclopaedia of educational media communications and technology". Westport:: Westport: Green Press; 1978, NULL. Text.