Encyclopedia of the American legislative system : studies of the principal structures, processes, and policies of Congress and the state legislatures since the colonial era; Volume I
editor in-chief, Joel H. Silbey
Charles Scribner`s Sons, Legislative bodies
 Buku Referensi
Encyclopedia of the American legislative system : studies of the principal structures, processes, and policies of Congress and the state legislatures since the colonial era; Volume III
editor in-chief, Joel H. Silbey
Charles Scribner`s Sons, 1994
 Buku Referensi
Encyclopedia of the American legislative system : studies of the principal structures, processes, and policies of Congress and the state legislatures since the colonial era; Volume II
editor in-chief, Joel H. Silbey
Charles Scribner`s Sons, 1994
 Buku Referensi
Fordham, Jefferson B.
The state legislative institution / Jefferson B. Fordham
University of Pennsylvania Press, 1959
 Buku Teks
Keefe, William J.
The American legislative process congress and the state
Prentice-Hall, 1994
 Buku Teks