APA

Hansen M. W., . (1974). The teachers at the University of Puerto Rico--Río Piedras. [Río Piedras]: Social Science Research Center, University of Puerto Rico.

Chicago

Hansen Millard W, . 1974. The teachers at the University of Puerto Rico--Río Piedras. [Río Piedras]: Social Science Research Center, University of Puerto Rico.

Harvard

Hansen M. W., . (1974). The teachers at the University of Puerto Rico--Río Piedras. [Río Piedras]: Social Science Research Center, University of Puerto Rico.

MLA

Hansen Millard W, . The teachers at the University of Puerto Rico--Río Piedras. [Río Piedras]: Social Science Research Center, University of Puerto Rico. 1974.