Gaya APA
Scientific Event Alert Network (SEAN) Bulletin Vol.5, No. 4, April 30, 1980. ().
Washington:
Smithsonian National Museum of Natural History.
Gaya MLA
Scientific Event Alert Network (SEAN) Bulletin Vol.5, No. 4, April 30, 1980.
.
Washington:
Smithsonian National Museum of Natural History,
.
.