Gaya APA
Scientific Event Alert Network (SEAN) Bulletin Vol.5, No. 12, December 31, 1980. ().
Washington:
Smithsonian National Museum of Natural History.
Gaya MLA
Scientific Event Alert Network (SEAN) Bulletin Vol.5, No. 12, December 31, 1980.
.
Washington:
Smithsonian National Museum of Natural History,
.
.