Dyfyniad APA

Brown, R., & Campbell, G. A. (1969). How to find out about the chemical industry. Pergamon Press.

Dyfyniad Arddull Chicago

Brown, Russell, and G. A. Campbell. How to Find Out About the Chemical Industry. Pergamon Press, 1969.

Dyfyniad MLA

Brown, Russell, and G. A. Campbell. How to Find Out About the Chemical Industry. Pergamon Press, 1969.

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