The Book of the States.
APA Citation
American Legislators' Association., Council of State Governments. The Book of the States. Lexington, Ky. [etc.]: Council of State Governments.
MLA Citation
American Legislators' Association, and Council of State Governments. The Book of the States. Lexington, Ky. [etc.]: Council of State Governments,
Warning: These citations may not always be complete (especially for serials).