APA

lewin d., . (1980). theory and desing of digital. london: van nostrand reinhold.

Chicago

lewin douglas, . 1980. theory and desing of digital. london: van nostrand reinhold.

Harvard

lewin d., . (1980). theory and desing of digital. london: van nostrand reinhold.

MLA

lewin douglas, . theory and desing of digital. london: van nostrand reinhold. 1980.