Gaya APA

Burstall, B, R, &, M, L. (1973). Chemical Economy: a guide to the technology and economics of the chemical industry. (--). London: Longman Group Limited.

Gaya MLA

Burstall, B.G., Reuben, &, M., L.. "Chemical Economy: a guide to the technology and economics of the chemical industry.". -- London: Longman Group Limited, 1973. Text.