Gaya APA

Kim, G. et al (2009). SP 261-21 Compressive Strength of Lightweight High-Strength Concrete Subjected to High Temperatures . USA: American Concrete Institute.

Gaya MLA

Kim, G.Y.. et al. "SP 261-21 Compressive Strength of Lightweight High-Strength Concrete Subjected to High Temperatures". USA: American Concrete Institute, 2009. Text.