The American Philatelic Society Congress, Inc, Schneider, S., Fuerst, T. P. d. l. S. F. d. C., Brandeberry, R. B. S. d. C. F. A., Hahn, J. D., Sousa, J. M., . . . Weigelt, H. Forty-third American Philatelic Congress: October 7-9, 1977 : Palmer House Hotel.
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Chicago Style (17th ed.) Zitazioa
The American Philatelic Society Congress, Inc, et al. Forty-third American Philatelic Congress: October 7-9, 1977 : Palmer House Hotel.
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MLA (9th ed.) Zitazioa
The American Philatelic Society Congress, Inc, et al. Forty-third American Philatelic Congress: October 7-9, 1977 : Palmer House Hotel.
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Kontuz: berrikusi erreferentzia hauek erabili aurretik.