Παραπομπή APA

(1982). Smithsonian year 1981: Annual report of the Smithsonian Institution for the year ended September 30, 1981. Washington: Smithsonian Institution Press.

Παραπομπή Chicago Style

Smithsonian Year 1981: Annual Report of the Smithsonian Institution for the Year Ended September 30, 1981. Washington: Smithsonian Institution Press, 1982.

Παραπομπή MLA

Smithsonian Year 1981: Annual Report of the Smithsonian Institution for the Year Ended September 30, 1981. Washington: Smithsonian Institution Press, 1982.

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