Pfeiffer, J. (1969). La Celula. Time-Life International.
Lua i Stíl Chicago (17ú heag.)Pfeiffer, John. La Celula. Netherland, N. V: Time-Life International, 1969.
Lua MLA (9ú heag.)Pfeiffer, John. La Celula. Time-Life International, 1969.
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