Aston,S.R, & Aston, S. R. (1983). Silicon geochemistry and biogeochemistry. Academic Press.
Chicago Style aipamenaAston,S.R, and S. R. Aston. Silicon Geochemistry and Biogeochemistry. London ; New York: Academic Press, 1983.
MLA aipamenaAston,S.R, and S. R. Aston. Silicon Geochemistry and Biogeochemistry. Academic Press, 1983.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.