Gruber, Ruth
Puerto Rico: island of promise
Hill and Wang, 1960
 Buku Teks
Galbraith, John Kenneth, 1908-2006
Marketing efficiency in Puerto Rico
Harvard University Press, 1955
 Buku Teks
Friedrich, Carl J.
Puerto Rico : middle road to freedom
Rinehart, 1959
 Buku Teks
Hanson, Earl Parker
Transformation : the story of modern Puerto Rico
Simon and Shuster, 1955
 Buku Teks
Shuster, George N.
Unesco Assessment and promise
Harper & Row,Publishers, 1963
 Buku Teks