(1989). Catastrophes and evolution: Astronomical foundations. Cambridge University.
Chicago-čujuhus (17. p.)Catastrophes and Evolution: Astronomical Foundations. Cambridge, England, United Kingdom: Cambridge University, 1989.
MLA-čujuhus (9. p.)Catastrophes and Evolution: Astronomical Foundations. Cambridge University, 1989.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.