APA استشهاد

British Standards Institution. (1971). UDC Pulp and paper Industry, Production of pulp, Paper and b. BSI.

استشهاد بنمط شيكاغو

British Standards Institution. UDC Pulp and Paper Industry, Production of Pulp, Paper and B. London: BSI, 1971.

MLA استشهاد

British Standards Institution. UDC Pulp and Paper Industry, Production of Pulp, Paper and B. BSI, 1971.