Gaya APA

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

Gaya MLA

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