Editing Tertiary source (section)

== Overlap with secondary sources ==
Depending on the topic of research, a scholar may use a [[bibliography]], [[dictionary]], or [[encyclopedia]] as either a tertiary or a secondary source.<ref name="umd"/> This causes some difficulty in defining many sources as either one type or the other.

In some academic disciplines, the differentiation between a secondary and tertiary source is relative.<ref name="umd"/><ref name=JCU />

In the [[UNISIST model|United Nations International Scientific Information System (UNISIST) model]], a secondary source is a bibliography, whereas a tertiary source is a synthesis of primary sources.<ref>{{Cite journal | last1 = Søndergaard | first1 = T. F. | last2 = Andersen | first2 = J. | last3 = Hjørland | first3 = B. | doi = 10.1108/00220410310472509 | title = Documents and the communication of scientific and scholarly information: Revising and updating the UNISIST model | journal = Journal of Documentation | volume = 59 | issue = 3 | pages = 278 | year = 2003 | s2cid = 14697793 }}</ref>