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parent

Example: Ruth Stricker Dayton ’57 P’88

Use a single quote mark (in the proper direction) before each number, no comma between, and no space between P and ’88. Add a space between name & class year and between class year & “P.”

percent

See also numbers.

Spell out and always use a numeral: 7 percent.

periodical names

See also titles of works.

Do not italicize when part of a building, prize, organization, etc.: He works for the Star Tribune.

When abbreviated, use italics: OED (Oxford English Dictionary); JAMA.

photo captions

See captions/cutlines.

possessives

For singular common nouns that end in s: add ’s: the class’s graduation party

For singular proper nouns that end in s, add ’s: Davis’s book, Texas’s laws, Congress’s deadline

For plural common nouns that end in s, add only an apostrophe: the three dogs’ bowl

For proper nouns with plural form, add only an apostrophe: United States’, General Motors’, the Petersons’ house.

For complete guidance on possessives, see Chicago 7.16.

postdoctoral

One word, no hyphen.

prefixes/suffixes

Follow Chicago 7.90.

president of Macalester

See also academic titles.

In a first reference to Macalester’s president in external publications, give her title and full name: President Suzanne M. Rivera. Thereafter, refer to her as President Rivera.

Lowercase “president” in more general descriptions: Suzanne Rivera is the president of �պ���Ʒ.

professor

See academic titles.

proofreaders’ marks

To be sure that your proofreading changes are correctly understood, use the proofreaders’ marks found at .