Yes, there are two accepted forms for possessive singular nouns ending in s:
Add an apostrophe (') after the existing s at the end of the word: Thomas'
Add an apostrophe s ('s) after the existing s at the end of the word: Thomas's
EXAMPLES
We're on our way to Thomas' party.
We're on our way to Thomas's party.
Note: The -s's is the most commonly used form, but if you are a student, use the form that is preferred by your teacher.
The possessive of scientist is scientist's (apostrophe S).
The single possessive of people is people's. The plural possessive of people is peoples'.
The correct spelling is "gentlemen's".
The correct possessive form of the plural noun women is women's.Example: The women's project is preparing the playground for summer.
The possessive form for the noun dynasty is dynasty's.
There would be an apostrophe and s, so it could be "The college's campus."
kids'
monies'
heroes
The singular possessive form is story's.
The singular possessive form of the noun municipality is municipality's.example: Street cleaning is the individual municipality's responsibility.
Yes, pony's is the correct singular possessive form.example: The pony's stall was very clean.