One source quoted in another

In-text referencing

As the cultural critic Norman Klein stated in 1997, the Romantics "gloried in the ruins of memory" (as cited in Cameron, 2008, p. 83).

(Klein, 1997, as cited in Cameron, 2008)

Reference List

Cameron, A. (2008). Modular narratives in contemporary cinema. Palgrave Macmillan.

Notes

One source quoted in another is also know as a secondary source.
Use secondary sources only when you cannot retrieve a copy of the original source.
If the year of the original source is unknown, omit it from the in-text citation.
List the secondary source in the Reference List; in the text of your essay include the original work that you have used and provide a citation for the secondary source.