Portland Cement Association. (1973). PCA soil primer. Portland Cement Association.
Chicago Style (17th ed.) CitationPortland Cement Association. PCA Soil Primer. Stokie, Ill.: Portland Cement Association, 1973.
MLA引文Portland Cement Association. PCA Soil Primer. Portland Cement Association, 1973.
警告：這些引文格式不一定是100％准確.