Tondl, L. (1973). Scientific procedures: A contribution concerning the methodological problems of scientific concepts and scientific explanation. D. Reidel.
Cita Chicago (17th ed.)Tondl, Ladislav. Scientific Procedures: A Contribution Concerning the Methodological Problems of Scientific Concepts and Scientific Explanation. Dordrecht: D. Reidel, 1973.
Cita MLA (9th ed.)Tondl, Ladislav. Scientific Procedures: A Contribution Concerning the Methodological Problems of Scientific Concepts and Scientific Explanation. D. Reidel, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.