Langlois، S. (2001). "Traditions: Social". International Encyclopedia of the Social & Behavioral Sciences. International Encyclopedia of the Social. ص. 15829–15833. DOI:10.1016/B0-08-043076-7/02028-3. ISBN:9780080430768.
S. Langlois, Traditions: Social, In: Neil J. Smelser and Paul B. Baltes, Editors-in-Chief, International Encyclopedia of the Social & Behavioral Sciences, Pergamon, Oxford, 2001, Pages 15829-15833, (ردمك 978-0-08-043076-8), دُوِي:10.1016/B0-08-043076-7/02028-3
