Hurd, D. L., Kipling, J. J., & Schwartz, G. I. (1964). The origins and growth of physical science. Penguin Books.
Παραπομπή σε μορφή Chicago (17η εκδ.)Hurd, David Leonard, J. J. Kipling, και George I. Schwartz. The Origins and Growth of Physical Science. Baltimore: Penguin Books, 1964.
Παραπομπή σε μορφή MLA (9th εκδ.)Hurd, David Leonard, et al. The Origins and Growth of Physical Science. Penguin Books, 1964.