How do you write that?

-Bunu nasıl yazıyorsun?
-Bu nasıl yazılır? (literally "how is this written?")

I'm wondering which suffix is used to express passive voice in Turkish. :-S

I've found a better explanation.....

The passive verb is formed by adding -li- after all consonants except 'l'. Vowel stems ending in 'l' or a vowel form their passive with their reflexive.....

Examples:
sevmek (to love) - sev-il- (to be loved)
almak (to buy) - al-ın- (to be bought)

This causes some cases of ambiguity between passive and reflexive. In such cases -il- can be added to the reflexive suffix to denote the passive state or a reflexive pronoun can be used to denote the reflexive state.

Only(?) one verb is irregular:
anlamak (to understand) - anlaşıl (to be understood)

Thanx bod.

My grammar's being improved more and more

There is also this article about the passive mood of verbs.....