Chicago Style Guide 17th Edition: Secondary sources

It is always better to read and cite the original source of your information. If that is not possible then cite the item as a secondary source ("quoted in...") a source that refers to the work of someone else. The original and secondary source must both be listed. The example shows a book quoted in another book.

In-Text Citation: Use a superscript number (like this: ¹) in the text at the place where you are indicating that you are citing from a source.

Footnote: #. Author First name/Initial Last name, Title of Book (Place of publication: Publisher, Year of publication). page number(s), quoted in Author First name/Initial Last name, Title of Book (Place of publication: Publisher, Year of publication), page number(s).

Example:

1.John V. Mitchell, More for Asia: Rebalancing World Oil and Gas (London: Chatham House, 2010), 11, quoted in Paul Ekins, Michael J. Bradshaw, and Jim Watson, Global Energy: Issues, Potentials, and Policy Implications (Oxford: Oxford University Press, 2015), 257.

Reference: Author Last name, First name. Title: Subtitle. Edition. Place of publication: Publisher, Year of publication. Quoted in Author First name Last name. Title of Book. Place of publication: Publisher, Year, page number(s). 

Example:

Mitchell, John V.  More for Asia: Rebalancing World Oil and Gas. London: Chatham House, 2010. Quoted in Paul Eakins, Michael J. Bradshaw, and Jim Watson. Global Energy: Issues, Potentials, and Policy Implications. Oxford: Oxford University Press, 2015, 257.

Still unsure what in-text citation and referencing mean? Check here.

Still unsure why you need to reference all this information? Check here.