Cita APA (7th ed.)
Estados Unidos. Department of Health, Education, and Welfare. (1971). How teachers make a difference.
Cita Chicago (17th ed.)
Estados Unidos. Department of Health, Education, and Welfare. How Teachers Make a Difference. 1971.
Cita MLA (9th ed.)
Estados Unidos. Department of Health, Education, and Welfare. How Teachers Make a Difference. 1971.
Atenció: Aquestes cites poden no estar 100% correctes.