"Kamu punya jeruk."

Translation: You have an orange.

[Ocram65]

Please, i want to kearn other fruits than jeruk and apel...

[PERCE_NEIGE]

https://blogs.transparent.com/indonesian/indonesian-fruit-vocabulary/

alpukat = avocado
anggur = grapes/wine.
aprikot = apricot
delima = pomegranate
jambu biji = guava
kelapa = coconut
lici/leci = lychee
mangga = mango
markisa = passionfruit
nanas = pineapple
pepaya = papaya
persik = peach
pir = pear
pisang = banana
semangka = watermelon
stroberi = strawberry
tomat = tomato

[rizalmuhammad]

That should be "kamu punya sebuah jeruk"

[PERCE_NEIGE]

It's not mandatory to have sebuah, but yes, your version is less ambiguous, as sebuah is really a/an.