Although not exactly on the student's main focus, there may be something of  
interest in the following texts: 
 
KENWORTHY, Eldon (1995). America/Americas: myth in the making of U.S. policy  
toward Latin America. University Park: The Pennsylvania State University  
Press. 
 
RICENTO, Thomas (2003). "The discursive construction of Americanism."  
Discourse & Society, vol. 14 (5). 
 
I hope these will help. 
 
Huascar Pessali