Stout, JJr 2016, 'Mexican War' , World Book Student, World Book, Chicago, viewed 17 May 2016,
<http://www.worldbookonline.com/student/article?id=ar358780>.
"James Knox Polk." Presidential Administration Profiles for Students. Ed. Kelle S. Sisung and Gerda-Ann Raffaelle. Detroit: Gale, 2003. N. pag. U.S. History in Context. Web. 19 May 2016.
"World Book Student | Article Page." World Book Student | Article Page. N.p., n.d. Web. 20 May 2016.
"World Book Student | Article Page." World Book Student | Article Page. N.p., n.d. Web. 24 May 2016.
"World Book Student | Article Page." World Book Student | Article Page. N.p., n.d. Web. 24 May 2016. <http://www.worldbookonline.com/student/article?id=ar321480&st=lewis%2Band%2Bclark#tab=homepage>.
"World Book Student | Article Page." World Book Student | Article Page. N.p., n.d. Web. 24 May 2016. <http://www.worldbookonline.com/student/article?id=ar599110&st=shelter%2Bin%2Bthe%2Bwest#tab=homepage>.
<http://www.worldbookonline.com/student/article?id=ar358780>.
"James Knox Polk." Presidential Administration Profiles for Students. Ed. Kelle S. Sisung and Gerda-Ann Raffaelle. Detroit: Gale, 2003. N. pag. U.S. History in Context. Web. 19 May 2016.
"World Book Student | Article Page." World Book Student | Article Page. N.p., n.d. Web. 20 May 2016.
"World Book Student | Article Page." World Book Student | Article Page. N.p., n.d. Web. 24 May 2016.
"World Book Student | Article Page." World Book Student | Article Page. N.p., n.d. Web. 24 May 2016. <http://www.worldbookonline.com/student/article?id=ar321480&st=lewis%2Band%2Bclark#tab=homepage>.
"World Book Student | Article Page." World Book Student | Article Page. N.p., n.d. Web. 24 May 2016. <http://www.worldbookonline.com/student/article?id=ar599110&st=shelter%2Bin%2Bthe%2Bwest#tab=homepage>.