Grayson-Smith, H. (1967). The changing concepts of science. Prentice Hall.
Cita Chicago (17th ed.)Grayson-Smith, Hugh. The Changing Concepts of Science. Englewood Cliffs, NJ: Prentice Hall, 1967.
Cita MLA (9th ed.)Grayson-Smith, Hugh. The Changing Concepts of Science. Prentice Hall, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.