Gaya APA

Ward, R, R., Swanson, C, P. (NULL). Practical technical writing . New: New York: Alfred A. Knopf; 1986.

Gaya MLA

Ward, Ritchie, R.., Swanson, Carl, P.. "Practical technical writing". New: New York: Alfred A. Knopf; 1986, NULL. Text.