An indirect source is when the ideas or direct quotes of the original author are published in another author’s work but you have not accessed and read the original source.
Whenever possible, find and use the source from the original author. You can ask a librarian for assistance in trying to locate the full text of the original source.
If the original source IS NOT AVAILABLE:
In text citation examples - CITE BOTH the indirect/secondary source and original source:
Miller (1998, p. 241, as cited in Agrios, 2005, p.57) found …
… as was found (Miller, 1998, p. 241, as cited in Agrios, 2005, p. 57).
References list citation example - CITE ONLY the indirect/secondary source:
Agrios, G.N. (2005). Plant pathology (5th ed.). Burlington, MA.: Elsevier Academic Press.