Gaya APA

GREWINGK, D, C. (2003). Grewingk’s Geology of Alaska and the Northwest Coast of America (REVISI). America: University of Alaska Press.

Gaya MLA

GREWINGK, DR., CONSTANTINE. "Grewingk’s Geology of Alaska and the Northwest Coast of America". REVISI America: University of Alaska Press, 2003. Text.