Gaya APA
Engel, J., R., Engel, J., G. (1990).
Ethics of Enviroment And Development : Global Challenge and International Response .
London:
Bethaven Press.
Gaya MLA
Engel, J., R., Engel, J., G..
Ethics of Enviroment And Development : Global Challenge and International Response.
London:
Bethaven Press,
1990.
Text.