MLA and APA
Do not add a period after an article title ending with an exclamation or question mark.
MLA Example:
Jacobs, Julia, et al. "When the House and the Senate are Controlled by Different Parties, Who Wins?" The New York Times, 7 Nov. 2018, www.nytimes.com/2018/11/07/us/politics/house-senate-difference-control.html.
APA Example:
Jacobs, J., Mervosh, S., & Stevens, M. (2018, November 7). When the House and the Senate are controlled by different parties, who wins? The New York Times. Retrieved from https://www.nytimes.com/2018/11/07/us/politics/house-senate-difference-control.html
Chicago (notes-bibliography format) [14.96]
Footnotes: Keep the comma after a title ending in a question or exclamation mark.
Bibliography: Omit the period after a title ending in a question or exclamation mark.
Example, Footnote:
1. Julia Jacobs, Sarah Mervosh, and Matt Stevens, "When the House and the Senate are Controlled by Different Parties, Who Wins?," The New York Times (November 2018), http:// kids.niehs.nih.gov/topics/natural-world/wildlife/animals/woodchuck-chuck/index.htm.
Example, Bibliography:
Jacobs, Julie, Sarah Mervosh, and Matt Stevens. "When the House and the Senate are Controlled by Different Parties, Who Wins?" The New York Times (November 2018), http:// kids.niehs.nih.gov/topics/natural-world/wildlife/animals/woodchuck-chuck/index.htm.