APA

Sandler Todd,, . (1997). Global challenges : An approach to environmental, political and economic problems. Cambridge: Cambridge University Press.

Chicago

Sandler Todd,, . 1997. Global challenges : An approach to environmental, political and economic problems. Cambridge: Cambridge University Press.

Harvard

Sandler Todd,, . (1997). Global challenges : An approach to environmental, political and economic problems. Cambridge: Cambridge University Press.

MLA

Sandler Todd,, . Global challenges : An approach to environmental, political and economic problems. Cambridge: Cambridge University Press. 1997.