Gaya APA
Scientific Event Alert Network (SEAN) Bulletin Volume 12, No. 8, August 31, 19877. ().
Washington:
Smithsonian Istitution.
Gaya MLA
Scientific Event Alert Network (SEAN) Bulletin Volume 12, No. 8, August 31, 19877.
.
Washington:
Smithsonian Istitution,
.
.