source 
(sôrs)
(sôrs)n.
1. A person or thing from which something comes into being or is derived or obtained: alternative sources of energy; the source of funding for the project.
2. The point of origin of a stream or river. See Synonyms at origin.
3. One, such as a person or document, that supplies information: A reporter is only as reliable as his or her sources.
4. Physics The point or part of a system where energy or mass is added to the system.
tr.v. sourced, sourc·ing, sourc·es
1. To specify the origin of (a communication); document: The report is thoroughly sourced.
2. To obtain (materials or parts) from another business, country, or locale for manufacture: They sourced the spoke nuts from our company.
3. To outsource or insource (tasks or jobs, for example).
[Middle English, from Old French sourse, from feminine past participle of sourdre, to rise, from Latin surgere; see SURGE.]