diff --git a/src/lab/Integers/Refrences.html b/src/lab/Integers/Refrences.html
index b0ffe12f..a433b347 100644
--- a/src/lab/Integers/Refrences.html
+++ b/src/lab/Integers/Refrences.html
@@ -99,7 +99,7 @@ <h2 class="text-h2-lightblue" style=" margin-bottom: 20px; margin-top: 10px; "><
 							
 							<!--edit -->
 <h1 class="text-h2-lightblue">Representation of Integers and their Arithmetic</h1><div class="content" id="experiment-article-section-8-content">
-<p>Computer Systems: A Programmer's Perspective, Second Edition (CS:APP2e) Randal E. Bryant and David R. O'Hallaron  Prentice Hall, 2011 (ISBN 0 13-610804-0)       </p>
+<p>Computer Systems: A Programmer's Perspective, 3/E (CS:APP3e), Randal E. Bryant and David R. O'Hallaron       </p>
 </div>						</div>
 					</div>
 			</div>
diff --git a/src/lab/Introduction.html b/src/lab/Introduction.html
index ed803166..ad159a57 100644
--- a/src/lab/Introduction.html
+++ b/src/lab/Introduction.html
@@ -120,7 +120,7 @@ <h1 class="text-h2-lightblue">Computer Systems Organization lab</h1><div>
             abstractions, integers and floating point numbers. We look at various approaches
             for representing <strong>integers</strong> and <strong>floating-point </strong>numbers in binary and, their pros and cons.
 	    The next four experiments involve writing <strong>assembly language programs</strong> using MIPS and ARM ISA.
-            In these experiments we learn how to map high-level language contructs to a sequence of 
+            In these experiments we learn how to map high-level language constructs to a sequence of 
             assembly language instructions. In the last experiment of this lab we shall study how to design
             a processor for a subset of MIPS ISA using Single Cycle Per Instruction approach. The idea here
             is that we would like to understand how we can map high level language constructs to assembly