But rather than relying upon an ordinary , typeset bibliography , Gonick sustains his unorthodox style and exuberant tone as the Professor takes the reader through a cartoon tour of his sources .
At the end of each published collection , Gonick thoroughly cites his sources .
Rather than relying upon an ordinary , typeset bibliography , Gonick sustains Gonick 's unorthodox style and exuberant tone as the Professor takes the reader through a cartoon tour of sources sources .
At the end of each published collection , Gonick thoroughly cites his sources .