APA引文

Penrose, R. (2011). Roger penrose collected works. Vol.3.

Chicago Edition Citation

Penrose, Roger. Roger Penrose Collected Works. Vol.3. Oxford Clarendon Press, Oxford, 2011.

MLA引文

Penrose, Roger. Roger Penrose Collected Works. Vol.3. 2011.

警告：這些引文格式不一定是100％准確.