Panitat Hasin และ Nattamon Koonsaeng. (2007) Synthesis and characterization of NiAl 2O4 spinel. Kasetsart University,:ม.ป.ท.Panitat Hasin และ Nattamon Koonsaeng. 2007. Synthesis and characterization of NiAl 2O4 spinel. ม.ป.ท.:Kasetsart University,;Panitat Hasin และ Nattamon Koonsaeng. Synthesis and characterization of NiAl 2O4 spinel. ม.ป.ท.:Kasetsart University, 2007. Print.