The names of U.S. states and territories are abbreviated in the reference list and in the Method section (suppliers' locations); use the official two-letter U.S. Postal Service abbreviations. To cite locations outside the United States, spell out the city and the country names. However, if you are publishing outside the United States or for an international readership, check your institution's or publisher's specific style guidelines for writing out or abbreviating state, province, territory, and country names.
Alabama
|
AL
|
Alaska
|
AK
|
Arizona
|
AZ
|
Arkansas
|
AR
|
California
|
CA
|
Colorado
|
CO
|
Connecticut
|
CT
|
Delaware
|
DE
|
Florida
|
FL
|
Georgia
|
GA
|
Hawaii
|
HI
|
Idaho
|
ID
|
Illinois
|
IL
|
Indiana
|
IN
|
Iowa
|
IA
|
Kansas
|
KS
|
Kentucky
|
KY
|
Louisiana
|
LA
|
Maine
|
ME
|
Maryland
|
MD
|
Massachusetts
|
MA
|
Michigan
|
MI
|
Minnesota
|
MN
|
Mississippi
|
MS
|
Missouri
|
MO
|
Montana
|
MT
|
Nebraska
|
NE
|
Nevada
|
NV
|
New Hampshire
|
NH
|
New Jersey
|
NJ
|
New Mexico
|
NM
|
New York
|
NY
|
North Carolina
|
NC
|
North Dakota
|
ND
|
Ohio
|
OH
|
Oklahoma
|
OK
|
Oregon
|
OR
|
Pennsylvania
|
PA
|
Rhode Island
|
RI
|
South Carolina
|
SC
|
South Dakota
|
SD
|
Tennessee
|
TN
|
Texas
|
TX
|
Utah
|
UT
|
Vermont
|
VT
|
Virginia
|
VA
|
Washington
|
WA
|
West Virginia
|
WV
|
Wisconsin
|
WI
|
Wyoming
|
WY
|