How to say "是出自谁手" (shì chū zì shuí shǒu) in Chinese dialogue

shìchūshuíshǒu

Who exactly wrote it?

Idioms & Colloquial Expressions
Grammar Patterns
INTERACTIVE SCRIPT TIMELINE
LINE 0101:48
xiě
gěi
lái
de
xìn

the letter written to Laifu...

LINE 0201:49
PLAYING SCENE
shì
chū
shuí
shǒu

Who exactly wrote it?

LINE 0303:26
lǎo
tóu
jiù
shì
kuài

This dirty old man sure is fast.

Show Information
Source MediaTV Series
Season & EpisodeS1 E5
Timestamp01:49
TMDB ID289209