Using the parenthetical / reference list Turabian citation style you correctly identify a source in the text (in-text) of your paper by including key source information next to the reference to that source in parenthesis. You can consult Section 18.3 of the manual for additional information if needed.
See Turabian's A Manual For Writers fugure A.11 in the appendix for a sample page of text with parenthetical citations.
Parenthetical Citation Example Index:
U.S. Constitution is cited as parenthetical citations ONLY. Do not include as an item in your reference list.