Cita APA (7th ed.)
Research Laboratories of the Portland Cement Association. (1948). Bulletin: Research Laboratories of the Portland Cement Association. Research Laboratories of the Portland Cement Association.
Cita Chicago (17th ed.)
Research Laboratories of the Portland Cement Association. Bulletin: Research Laboratories of the Portland Cement Association. Chicago: Research Laboratories of the Portland Cement Association, 1948.
Cita MLA (9th ed.)
Research Laboratories of the Portland Cement Association. Bulletin: Research Laboratories of the Portland Cement Association. Research Laboratories of the Portland Cement Association, 1948.
Atenció: Aquestes cites poden no estar 100% correctes.