ACI Committee 221. (1997). Guide for use of normal weight and heavyweight aggregates in concrete. American Concrete Institute.
Chicago Style (17th ed.) CitationACI Committee 221. Guide for Use of Normal Weight and Heavyweight Aggregates in Concrete. Farmington Hills, Mich.: American Concrete Institute, 1997.
MLA (9th ed.) CitationACI Committee 221. Guide for Use of Normal Weight and Heavyweight Aggregates in Concrete. American Concrete Institute, 1997.
Warning: These citations may not always be 100% accurate.