The correct answer is reflexive.
Reflexive pronouns are used when the object of the sentence is the same person as the subject. Here, the subject is Johnny and given that he bought something for himself, he is also the object. Although the pronoun himself can sometimes be intensive, this is not the case where it is. Intensive pronoun would be if the sentence said: Johnny himself bought a new basketball.
Possibly to emphasize it, or to mark it as being sarcastic. You choose.
The word you are looking for is Bibliography. Remember that a bibliography is <span> a list of sources, usually appearing at the end of a research paper, an article, a book, or a chapter in a book. The list documents sources used in the work and points out sources that might be useful for further research. every single entry helps the reader to know more about an especific information and for them to read the whole reference</span>
C. "Wearing a wet half smile, her ancient dog sullenly waddled toward me like Yoda greeting Luke." —Student essay