誰が書いたか

who wrote it

→ 誰
phrase Rare #36,709
who wrote it An embedded question meaning “who wrote it?”; か marks the question clause, which is often followed by verbs such as 知る (to know), 分かる (to understand), or 調べる (to investigate).
JA: この絵を誰が書いたか知っていますか。
EN: Do you know who painted this picture?

この本を誰が書いたか知っていますか

Do you know who wrote this book?

誰が書いたか知ってる

Do you know who wrote it?

誰が書いたかわかる

Can you tell who wrote it?

誰が書いたか調べる死せる詩人の会について聞かれる

Someone asks who wrote Dead Poets Society.

— いまを生きる (1989)