I'm new to writing research papers and I need some help, with plagiarism in general. Here is an excerpt from my paper. Is this within the usual norms for research papers, or am I risking plagiarizing?
“Clay has the general theoretical formula Al2O3 2SiO2 2H20 There are numberless varieties of clay, but it may roughly be divided into ball clay, china clay, and fire clay; or, in other words, a plastic clay, a non-plastic clay, and a refractory clay.” (Stephenson 12)
Here's a link to a pdf of the text. Ceramic Chemistry by. H.H. Stephenson