APA
(19). Effects of acid deposition on the forests of Europe and North America. [S.l: s.n.
Chicago
19. Effects of acid deposition on the forests of Europe and North America. [S.l: s.n.
Harvard
(19). Effects of acid deposition on the forests of Europe and North America. [S.l: s.n.
MLA
Effects of acid deposition on the forests of Europe and North America. [S.l: s.n. 19.