Não informado. (1982). Environmental Research Center Papers. University of Tsukuba, Environmental Research Center.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Environmental Research Center Papers. Ibaraki, Japão: University of Tsukuba, Environmental Research Center, 1982.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Environmental Research Center Papers. University of Tsukuba, Environmental Research Center, 1982.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.