| No. of authors | In-text citation | References |
| One | (Babbie 2017) |
Babbie, Earl R. 2017. The Basics of Social Research. 7th ed. Boston: Cengage Learning. |
| Two | (Amalberti and Vincent 2016) |
Amalberti, René, and Charles Vincent. 2016. Safer Healthcare: Strategies for the Real World. Cham: Springer Open. |
| Three | (Mastroianni, Kahn, and Kass 2019) |
Mastroianni, Anna C., Jeffrey P. Kahn, and Nancy E. Kass. 2019. The Oxford Handbook of Public Health Ethics. Oxford: Oxford University Press. |
| Four or more | (Lang et al. 2014, 1895) |
Lang, Markus, Patricia Deflorin, Helmut Dietl, and Eric Lucas. 2014. "The Impact of Complexity on Knowledge Transfer in Manufacturing Networks." Production and Operations Management 23 (11):1886–1898. https://doi.org/10.1111/poms.12193. |
In Section 15.56, The Chicago Manual of Style discourages the quoting of secondary sources. However, if it cannot be avoided, include the original author and date in the text. Cite the secondary source in reference list as that is the one you have consulted.
Walz, Robin. 2008. Modernism. Edinburgh: Pearson Education, 2008.
(Eysteinsson's Concept of Modernism 1990 quoted in Walz 2018, 234)
Eysteinsson (Concept of Modernism1990 quoted in Walz 2018, 234) ...