Frey, K. (1977). Research in science education in Europe: Perspectives, structural problems and documentation. Swets & Zeitlinger.
Chicago Style (17th ed.) CitationFrey, Karl. Research in Science Education in Europe: Perspectives, Structural Problems and Documentation. Amsterdam: Swets & Zeitlinger, 1977.
MLA (9th ed.) CitationFrey, Karl. Research in Science Education in Europe: Perspectives, Structural Problems and Documentation. Swets & Zeitlinger, 1977.
Warning: These citations may not always be 100% accurate.