APA Style
Johnston, R.J.. (1989).
Environmental Problems .
London:
BELHAVEN PRESS.
Chicago Style
Johnston, R.J..
Environmental Problems.
London:
BELHAVEN PRESS,
1989.
.
MLA Style
Johnston, R.J..
Environmental Problems.
London:
BELHAVEN PRESS,
1989.
.
Turabian Style
Johnston, R.J..
Environmental Problems.
London:
BELHAVEN PRESS,
1989.
.