APA استشهاد

Vacca, R. (1980). Modest Technologies for a Complicated world. Pergamon Press.

استشهاد بنمط شيكاغو

Vacca, Roberto. Modest Technologies for a Complicated World. Oxford: Pergamon Press, 1980.

MLA استشهاد

Vacca, Roberto. Modest Technologies for a Complicated World. Pergamon Press, 1980.