Palapa, Neza Rahayu, Saria, Yosi, Taher, Tarmizi, Mohadi, Risfidian, AND Lesbani, Aldes. " Synthesis and Characterization of Zn/Al, Zn/Fe, and Zn/Cr Layered Double Hydroxides: Effect of M3+ ions Toward Layer Formation" Science and Technology Indonesia [Online], Volume 4 Number 2 (27 April 2019)