@aarian,
Using either the APA or Chicago Manual of Style you must always provide a full reference on the reference page for anything referenced in the body of your document. This is to allow readers to have enough information that they can look up the original source document.
The references that only appear in the body of your paper are those of personal correspondence or interview. These do not have corresponding entries on the reference page as there are no source documents per se to view.
Since you made an effort to provide a reference this doesn’t relate to plagiarism.