Frey, K. (1971). Theorien des Curriculums. Beltz.
Chicago Style (17th ed.) CitationFrey, Karl. Theorien Des Curriculums. Weinheim [u.a.]: Beltz, 1971.
MLA (9th ed.) CitationFrey, Karl. Theorien Des Curriculums. Beltz, 1971.
Warning: These citations may not always be 100% accurate.