Milton, O. (1973). Alternatives to the tracitional. Jossey- Bass.
Cita Chicago (17th ed.)Milton, Ohmer. Alternatives to the Tracitional. Sanfrancisco: Jossey- Bass, 1973.
Cita MLA (9th ed.)Milton, Ohmer. Alternatives to the Tracitional. Jossey- Bass, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.