So if we want to reference this scientific article: “Testing consumer preferences for iced-coffee: Does the drinking environment have any influence?” by C. Petit and J.M. Sieffermann:
Petit, C., and J.M. Sieffermann. 2007.“Testing Consumer Preferences for Iced-Coffee: Does the Drinking Environment Have Any Influence?.” 18(1): 161-72. http://dx.doi.org/10.1016/j.foodqual.2006.05.008 (April 25, 2019).
And an in-text citation would look like this:
(Petit and Sieffermann 2007)
Citing a website in American Political Science Association reference style