Cohen, Morris L.
How to find the law/Robert C. Berring
West Publishing Company, 1983
Buku Teks
Berring, Robert C.
Finding the law / by Robert C. Berring, Elizabeth A. Edinger.
Thomson/West, 2005
Buku Teks
Fitzgerald, Gerald B.
Community organization for recreation / Gerald B. Fitzgerald
A.S.Barnes and Company, 1948
Buku Teks
An American constitutional law reader / edited Robert B. McKay
Oceana Publications, 1958
Buku Teks
American studies : topics and sources / editor. Robert H. Walker
Greenwood Press, 1976
Buku Teks