APA Edition Citation

Penrose, R. (2011). Roger penrose collected works. Vol.6.

Chicago Edition Citation

Penrose, Roger. Roger Penrose Collected Works. Vol.6. Oxford Clarendon Press, Oxford, 2011.

MLA Edition Citation

Penrose, Roger. Roger Penrose Collected Works. Vol.6. 2011.

Warning: These citations may not always be 100% accurate.