Gaya APA
Grego, P. (2014).
Blasing a Ghostly Trail: ISON and Great Comets of the Past and Future .
Switzerland:
Springer.
Gaya MLA
Grego, Peter.
"Blasing a Ghostly Trail: ISON and Great Comets of the Past and Future".
Switzerland:
Springer,
2014.
Text.