Hurd, D. L., Kipling, J. J., & Schwartz, G. I. (1964). The origins and growth of physical science Volume 1. Penguin Books.
Cita Chicago (17th ed.)Hurd, David Leonard, J. J. Kipling, i George I. Schwartz. The Origins and Growth of Physical Science Volume 1. Baltimore: Penguin Books, 1964.
Cita MLA (9th ed.)Hurd, David Leonard, et al. The Origins and Growth of Physical Science Volume 1. Penguin Books, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.