Παραπομπή σε μορφή APA (7η εκδ.)

(1969). Our presidents and their times: Social studies unit books series. Xerox Education.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Our Presidents and Their Times: Social Studies Unit Books Series. Columbus, Ohio: Xerox Education, 1969.

Παραπομπή σε μορφή MLA (8th εκδ.)

Our Presidents and Their Times: Social Studies Unit Books Series. Xerox Education, 1969.