Chicago Style Guide 17th Edition: Print journal article, more than three authors

Reference: First Author(s) Last name, First name, remaining authors First name Last name. “Title of Article.” Journal Title Volume, Issue no. (Month Year): pages.

Example:

Virtue, Simon, Holly Wright, Dale Diamond, and Sheila Murphy. “Was Mark Twain a Nihilist?” American Literary Essays 3, no. 88 (1943): 13-27.

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.

Example:

Virtue et al. have traced the dialectic between romanticism and anti-romanticism in Twain's thought.³

Footnote: #. Author(s) First name Last name et al., “Title of Article,” Journal Title Volume, Issue no. (Month Year): Page.

Example:

 3. Simon Virtue et al., 'Was Mark Twain a Nihilist?', American Literary Essays 3, no. 88 (1943): 13-27.

Note: For more than three authors, list all of the authors in the bibliography; in the footnote, list only the first author, followed by et al., (“and others”). For more than ten authors, list the first seven in the bibliography followed by et al.. List only the first author followed by et al., in the footnote. 

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

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