Lee, Y. L., Ahmad Zaidi, A. M., Koh , H. B., Sulaiman, S., Adnan, S. H., & Abdul Rahman, I. (2010). Carbonation and water permeability of foamed concrete. Penerbit Universiti Tun Hussein Onn Malaysia.

Lee, Yee Loon, Ahmad Mujahid Ahmad Zaidi, Heng Boon Koh , Suhaizad Sulaiman, Suraya Hani Adnan, and Ismail Abdul Rahman. Carbonation and Water Permeability of Foamed Concrete. Penerbit Universiti Tun Hussein Onn Malaysia, 2010.

Lee, Yee Loon, et al. Carbonation and Water Permeability of Foamed Concrete. Penerbit Universiti Tun Hussein Onn Malaysia, 2010.