Exactly, it should be "gazeteler"
No it does not!
I'm asking you to read all the comments here that say it is not, "gazeteler."
Then reflect on those comments, pause & think before asking me to explain why it is not?
I'm asking you to reply to me on Monday 13/09/2021 if you are still not convinced.
General direct objects do not take the plural suffix in Turkish. This sentence could be either "books" or "a book." Keep in mind, this ambiguity is only true when it is a direct object and not when it is a subject.
They read books.
They read a book.
"Onlar gazete okurlar."
They read newspapers.
They read a newspaper.
If someone says this sentence, you should know that it means "newspapers".
Maybe how? I'll explain:
X Y a newspaper = X bir gazete Y (undefinite singular - used with "bir")
X Y newspapers = X gazete Y (undefinite plural - used without "bir")
X = subject; Y = predicate / verb
This is very clear whether it is singular or plural.
Annnnd with this link, you can defeat the turkish verb conjugations easily..
When I traveled in Istanbul for a few summers visiting relatives, I listened to everyday speech, the plural as well as onlar are often omitted in Turkish, I guess it depends who is speaking. Younger people tend to omit some words and pronunciate others so that us foreigners can't listen to all the words there! I also verified this with my Turkish teacher who grew up in Istanbul as well. I hope this helps...
What I got so far is BOTH versions are perfectly correct. In Turkish, when using 3rd Person Plural (They/Onlar) you always can cut the plural ("-lar" or "-ler") from the verb . If you do that the verb stays in the same form as in 3rd person singular (in this case: "okur") :)
p.s. Why are there no time stamps here, you never know wether a comment is one day or one year old ^^
Possessive case example:
& please read what (miss) has said on singulars & plurals.
"The girls' newspapers." - Kızların gazeteleri.
Why is it gazeteleri?
It's because the possessive suffix follows 4-way vowel harmony (not 2)
So you have to use i, ı, u, or ü. Since the last vowel is e, it maps to i.
The girl's newspapers. = The newspapers of the girl = kızın gazeteleri.
The girls' newspapers. = The newspapers of the girls = kızların gazeteler.