"The Truck and Ladder." Physic Classroom. N.p.. Web. 9 Apr 2014. <http://www.physicsclassroom.com/mmedia/newtlaws/il.cfm>.
"Newton's 3 Laws of Motion." Teacher Tech. N.p.. Web. 9 Apr 2014. < http://teachertech.rice.edu/Participants/louviere/Newton/law2.html>.
"Everyday Examples of Newton's 3rd Law." Physic Forum. N.p.. Web. 9 Apr 2014. <http://www.physicsforums.com/showthread.php?t=285296>.
"Newton's Laws." Hyper Physics. N.p.. Web. 9 Apr 2014.
<http://hyperphysics.phy-astr.gsu.edu/hbase/newt.html>.
"Newton's 3 Laws of Motion." Teacher Tech. N.p.. Web. 9 Apr 2014. < http://teachertech.rice.edu/Participants/louviere/Newton/law2.html>.
"Everyday Examples of Newton's 3rd Law." Physic Forum. N.p.. Web. 9 Apr 2014. <http://www.physicsforums.com/showthread.php?t=285296>.
"Newton's Laws." Hyper Physics. N.p.. Web. 9 Apr 2014.
<http://hyperphysics.phy-astr.gsu.edu/hbase/newt.html>.