You can look into this section of the book Group theory in physics by Wu-Ki Tung to begin with.
EDIT: Theorem 11.3 from this book works for complex irreps only (see Jose's comments to the answer and to the question).
You can look into this section of the book Group theory in physics by Wu-Ki Tung to begin with.
EDIT: Theorem 11.3 from this book works for complex irreps only (see Jose's comments to the answer and to the question).