APA (7th ed.) Zitazioa

National Index of Public Effort to Fund Higher Education, 1930-96. US Department of Education.

Chicago Style (17th ed.) Zitazioa

National Index of Public Effort to Fund Higher Education, 1930-96. US Department of Education.

MLA (9th ed.) Zitazioa

National Index of Public Effort to Fund Higher Education, 1930-96. US Department of Education.

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