Corney, Alan. "The absorption and stimulated emission of radiation." Atomic and Laser Spectroscopy. : Oxford University Press, 2006-10-05. Oxford Scholarship Online. 2007-09-01. Date Accessed 24 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199211456.001.0001/acprof-9780199211456-chapter-9>.
Corney, A.(2006-10-05). The absorption and stimulated emission of radiation. In Atomic and Laser Spectroscopy. : Oxford University Press. Retrieved 24 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199211456.001.0001/acprof-9780199211456-chapter-9.
Corney, Alan. "The absorption and stimulated emission of radiation." In Atomic and Laser Spectroscopy. : Oxford University Press, 2006-10-05. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199211456.001.0001/acprof-9780199211456-chapter-9.
Corney A. The absorption and stimulated emission of radiation. In: Corney A. Atomic and Laser Spectroscopy. Oxford University Press; 2006. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199211456.001.0001/acprof-9780199211456-chapter-9. Accessed May 24, 2013.