The Nature of the Hydrogen Bond: Outline of a Comprehensive Hydrogen Bond Theory. : Oxford University Press, 2009-06-01. Oxford Scholarship Online. 2009-09-01. Date Accessed 21 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199558964.001.0001/acprof-9780199558964>.
(2009-06-01). The Nature of the Hydrogen Bond: Outline of a Comprehensive Hydrogen Bond Theory. : Oxford University Press. Retrieved 21 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199558964.001.0001/acprof-9780199558964.
The Nature of the Hydrogen Bond: Outline of a Comprehensive Hydrogen Bond Theory. : Oxford University Press, 2009-06-01. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199558964.001.0001/acprof-9780199558964.
Gilli G, Gilli P. The Nature of the Hydrogen Bond: Outline of a Comprehensive Hydrogen Bond Theory. Oxford University Press; 2009. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199558964.001.0001/acprof-9780199558964. Accessed May 21, 2013.