Não informado. (1964). IBP news. International Council of Scientific Unions, Special Committee for the International Biological Programme.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. IBP News. London: International Council of Scientific Unions, Special Committee for the International Biological Programme, 1964.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. IBP News. International Council of Scientific Unions, Special Committee for the International Biological Programme, 1964.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.