When joint possession is being shown with an organization’s or business firm’s name, use the possessive form only in the last word of the noun or name.
US Food and Drug Administration’s policy
Farrar, Straus and Giroux’s books
Centers for Disease Control and Prevention’s Task Force...
Use ’s after only the last word of a compound term.
When joint possession is being shown with an organization’s or business firm’s name, use the possessive form only in the last word of the noun or name....
Do not use ’s with possessive pronouns: his, hers, ours, its, yours, theirs, whose.
The idea was hers.
Give the book its due.
Do not confuse the contraction of it is (it’s) with the possessive its, eg, “It’s an excellent resource. I have not seen its equal.”...
Use the apostrophe to show the possessive case of proper nouns in accordance with the following examples (see 15.2, Eponyms, Nonpossessive Form):
Jones’ bones (1 person named Jones)
the Joneses’ bones (2 or more people named Jones)
If a singular or plural word does not end in ...
With units of time (minute, hour, day, month, year, and so on) used as possessive adjectives, an ’s is added. (Note: For the plural units, add an ’ after the s.) The same holds true for monetary terms:
Do not use an apostrophe to indicate the plural of a name. Do not use an apostrophe in the name of an organization in which the qualifying term is used as an adjective or an attributive rather than a possessive. Of course, always follow the official name....