Gaya APA
Breining, G. (2010).
Super volcano: the ticking time bomb beneath Yellowstone National Park (Cet. 1).
USA:
Voyageur Press.
Gaya MLA
Breining, Greg.
"Super volcano: the ticking time bomb beneath Yellowstone National Park".
Cet. 1
USA:
Voyageur Press,
2010.
Text.