APA

Friedrich C. J. 1., . (1953). Public policy. Estados Unidos: Graduate School of Public Administration.

Chicago

Friedrich Carl Joachim 1901-1984, . 1953. Public policy. Estados Unidos: Graduate School of Public Administration.

Harvard

Friedrich C. J. 1., . (1953). Public policy. Estados Unidos: Graduate School of Public Administration.

MLA

Friedrich Carl Joachim 1901-1984, . Public policy. Estados Unidos: Graduate School of Public Administration. 1953.