(1969). Our presidents and their times: Social studies unit books series. Xerox Education.
Lua i Stíl Chicago (17ú heag.)Our Presidents and Their Times: Social Studies Unit Books Series. Columbus, Ohio: Xerox Education, 1969.
Lua MLA (8ú heag.)Our Presidents and Their Times: Social Studies Unit Books Series. Xerox Education, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.