ABBOTT, P. NATURAL DISASTERS. McGraw Hill.
Chicago-viite (17. p.)ABBOTT, Patrick. NATURAL DISASTERS. McGraw Hill.
MLA-viite (8. p.)ABBOTT, Patrick. NATURAL DISASTERS. McGraw Hill.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.
ABBOTT, P. NATURAL DISASTERS. McGraw Hill.
Chicago-viite (17. p.)ABBOTT, Patrick. NATURAL DISASTERS. McGraw Hill.
MLA-viite (8. p.)ABBOTT, Patrick. NATURAL DISASTERS. McGraw Hill.