Gaya APA
Breining, G. (2007).
Super volcano : the ticking time bomb beneath Yellowston National Park (cet. 1).
OXFORD:
Voyageur Press.
Gaya MLA
Breining, Greg.
"Super volcano : the ticking time bomb beneath Yellowston National Park".
cet. 1
OXFORD:
Voyageur Press,
2007.
Text.