Παραπομπή APA

(1969). Smithsonian year 1969: Annual report of the Smithsonian Institution for the year ended 30 June 1969. Washington: Smithsonian Institution Press.

Παραπομπή Chicago Style

Smithsonian Year 1969: Annual Report of the Smithsonian Institution for the Year Ended 30 June 1969. Washington: Smithsonian Institution Press, 1969.

Παραπομπή MLA

Smithsonian Year 1969: Annual Report of the Smithsonian Institution for the Year Ended 30 June 1969. Washington: Smithsonian Institution Press, 1969.

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