Problem with stopping audio?

So I get the error Only assignment, call, increment, decrement, and new object expressions can be used as a statement

in this code

	public void sound (string sound)
		if (GetComponent<AudioSource> ().isPlaying) {
			GetComponent<AudioSource> ().Stop;
		} else {
			GetComponent<AudioSource> ().Play;

I want to alternate between stopping and playing the song when a button is pressed. I know this is probably wrong, so how can I do it right?

woops just missing the () at the end lol.