"Appendix B The First 100 Catalan Numbers." Oxford Scholarship Online. 2009-01-01. Oxford University Press. Date of access 23 May. 2013, <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195334548.001.0001/acprof-9780195334548-appendix-2>.
(2009-01-01). Appendix B The First 100 Catalan Numbers. Oxford Scholarship Online. Retrieved 23 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195334548.001.0001/acprof-9780195334548-appendix-2.
"Appendix B The First 100 Catalan Numbers." Oxford Scholarship Online. 23 May. 2013. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195334548.001.0001/acprof-9780195334548-appendix-2.
Appendix B The First 100 Catalan Numbers. In: Koshy T. Catalan Numbers with Applications. Oxford University Press; 2008. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195334548.001.0001/acprof-9780195334548-appendix-2. Accessed May 23, 2013.