One source quoted in another

In the text you may have written...

In 2013 Kerridge et al. defined ethics as “the study of what we ought to do”¹.

Format

Footnote Number. Original Author(s)[first name and surname of two authors BUT first author et al. for three and more] , Title of work, (publisher, year of publication), pages, quoted in Secondary Source Author Full Name(s), Title of Work, edition number. (Publisher, Year of publication), Pages. 

First entry:

1. Camron Stewart, et al., Ethics and Law for the Health Professions (Federation Press, 2013), 3 quoted in Fiona MacDonald and Shih-Nang Then, Ethics, Law and Health Care: A Guide for Nurses and Midwives. 2nd ed. (Red Globe Press, 2019),1. 

Second and subsequent entries:

2. Stewart et al., Ethics and Law, 3 quoted in MacDonald and Then, Ethics, Law and Health Care,1

Author #1 Last Name, First Name, and Author #2 First Name Last Name. Title of Work: Subtitle of Work. Edition. Publisher, Year.

McDonald, Fiona, and Shih-Ning Then. Ethics, Law and Health Care: A Guide for Nurses and Midwives. 2nd ed. Red Globe Press, 2019.

• It is best practice to find the original source you find quoted in another source – for accuracy and to check that the meaning of the original has not been lost.
• Also known as a secondary source, they should only be used when you cannot retrieve a copy of the original source.
• List the secondary source in the Reference List  - ie the one you found the quote/idea etc in.
• Sometimes if what you are looking at online is made available by an institution holding the originals – like art works, manuscripts and diaries etc – they can be considered as primary sources so you would reference them as that – use formatting advice according to the type of source you are using.
• If source is online, add URL.
• See CMOS 14.160.