Sources

This is the number of unique sources used to create this encyclopedia entry. A source is considered unique according to its authorship, irrespective of how many pages, chapters, sections, editions, or language versions of that source are cited. Thus, multiple citations to different parts or translations of a work by the same author or authors count as a single unique source. A work jointly authored by multiple people likewise counts as one unique source.

Examples

If several different sections of a book by Smith are cited, they collectively count as one unique source.
If both the Arabic and English versions of the same work by Jones are cited, they collectively count as one unique source.
If a book has three co-authors, citations to that book count as one unique source, not three.
If works by Smith, Jones, and Baker are cited, they count as three unique sources.