There are two ways to cite in Chicago style:
...according to Abdou1
1. Name Surname, Book Title in Italics (Place of publication: Publisher, Year), page number.
Example:
Surname, Name. Book Title in Italics. Place of publication: Publisher, Year.
Example:
... according to Koven1
1. Name Surname, "Title of Article: Subtitle," Title of Journal in Italics volume, issue no. (Year): page.
Example:
1. Suzanne Koven, "Mom at Bedside, Appears Calm," The New England Journal of Medicine 370, no. 2 (2014): 104.
Surname, Name. "Title of Article: Subtitle." Title of Journal in Italics volume, issue no. (Year): page range.
Example:
Koven, Suzanne. "Mom at Bedside, Appears Calm." The New England Journal of Medicine 370, no. 2 (2014): 104-105.
found in UNESCO website1
1. Name Surname, “Title of Web Page,” Title of Website, Publishing Organization, available publication or update date, otherwise access date, URL.
Example:
1.UNESCO, "UNESCO in Brief," UNESCO, September 5, 2018, https://en.unesco.org/about-us/introducing-unesco
Surname, Name. “Title of Web Page.” Title of Website. Publishing organization, available publication or update date. Otherwise access date. URL.
Example:
UNESCO. "UNESCO in Brief." UNESCO, September 5, 2018. https://en.unesco.org/about-us/introducing-unesco
A primary source can take various forms, it could be an image, a video, or a manuscript. For each form, you need to follow different rules in order to cite it. Here is an example of a speech found in an edited collection of primary sources
Check out Purdue OWL Chicago Style Guide to find out more.