Não informado. (2018). Report of the U.S. National Committee for the International Biological Program. National Academy of Sciences.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Report of the U.S. National Committee for the International Biological Program. Washington: National Academy of Sciences, 2018.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Report of the U.S. National Committee for the International Biological Program. National Academy of Sciences, 2018.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.