Laposata,Matthew. (2015). ESSENTIALS ENVIRONMENT (4th.). PEARSON.
Chicago Style aipamenaLaposata,Matthew. ESSENTIALS ENVIRONMENT. 4th. Tamilanadu: PEARSON, 2015.
MLA aipamenaLaposata,Matthew. ESSENTIALS ENVIRONMENT. 4th. PEARSON, 2015.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.