Federal:

U.S. Code
  (current and federal laws arranged by subject)

• Sample citation: 20 U.S.C. 1070a
  (Title 20, section 1070a)

U.S. Statutes at Large
  (all the laws passed by Congress and signed by the President arranged chronologically)

• Sample citation: P.L. 89-329
  (the 329th Public Law passed by the 89th Congress)

                   or: 79 STAT 1219
          (Vol. 79, page 1219)

State:

Colorado Revised Statutes

• Sample citation: C.R.S. 24-71-101
  (Colo. Electronic Sig Act)

Code of Federal Regulations (Administrative rules passed by federal agencies)

• Sample citation: 34 CFR 690 (Title 34, chapter 690)
• Regulations.gov  (www.regulations.gov)

Federal Register (New and amended regulations appear here first)

• Sample citation: 50 FR 10717 (Volume 50, page 10717)

Federal:

• Specht v. Netscape Communications Corp., 306 F3d 17 (2d Cir.2002)

 State:

• Mack Massey Motors, Inc. v. Garnica, 814 S.W.2d 167 (1991)
  Court of Appeals of Texas

Law Review Article:

46 Wayne L. Rev. 1735, The Unfairness of Click-On Software Licenses

Volume 46 of the Wayne State University Law Review, starting on page 1735.

If you have a citation these are 2 resources to use:

A legal citation is a reference to a specific legal resource such as a statute, legal case, or law journal article.

It typically includes:

- volume number,
- name of resource,
- a page or section number