APA

Hagen E., . (1963). On the theory of social change. Bogotá: The Dorsey Press.

Chicago

Hagen Everett, . 1963. On the theory of social change. Bogotá: The Dorsey Press.

Harvard

Hagen E., . (1963). On the theory of social change. Bogotá: The Dorsey Press.

MLA

Hagen Everett, . On the theory of social change. Bogotá: The Dorsey Press. 1963.