(1969). Our presidents and their times: Social studies unit books series. Xerox Education.
Citación estilo ChicagoOur Presidents and Their Times: Social Studies Unit Books Series. Columbus, Ohio: Xerox Education, 1969.
Cita MLAOur Presidents and Their Times: Social Studies Unit Books Series. Xerox Education, 1969.
Warning: These citations may not always be 100% accurate.