APA

Columbia University, . (1926). A survey of the public educational system of Porto Rico. New York: Teachers College, Columbia University.

Chicago

Columbia University, . 1926. A survey of the public educational system of Porto Rico. New York: Teachers College, Columbia University.

Harvard

Columbia University, . (1926). A survey of the public educational system of Porto Rico. New York: Teachers College, Columbia University.

MLA

Columbia University, . A survey of the public educational system of Porto Rico. New York: Teachers College, Columbia University. 1926.