Page:U.S. Government Printing Office Style Manual 2008.djvu/120

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104
Chapter 6.

6.35.

Unless usage demands otherwise, use a hyphen to join a prefix or combining form to a capitalized word. (The hyphen is retained in words of this class set in caps.)

anti-American
pro-British
un-American
non-Government
neo-Nazi
post-World War II or post-Second World War
non-Federal
but
nongovernmental
overanglicize
transatlantic
Numerical compounds
6.36.

Print a hyphen between the elements of compound numbers from twenty-one to ninety-nine and in adjective compounds with a numerical first element.

twenty-one
twenty-first
6-footer
6-foot-ll-inch man
24-inch ruler
3-week vacation
8-hour day
10-minute delay
20th-century progress
3-to-l ratio
5-to-4vote
.22-caliber cartridge
2-cent-per-pound tax
four-in-hand tie
three-and-twenty
two-sided question
multimillion-dollar fund
10-dollar-per-car tax
thirty- (30-) day period
but
one hundred twenty-one
100-odd
foursome
threescore
foursquare
$20 million airfield
second grade children
6.37.

Print without a hyphen a modifier consisting of a possessive noun preceded by a numeral. (See also rule 8.14.)

1 month's layoff
3 weeks' vacation
1 week's pay
1 minute's delay
2 hours' work

but a 1-minute delay