APA
UNFPA UNITED NATIONS POPULATION FUND, . (1991). POPULATION AND THE ENVIRONMENT:THE CHALLENGES AHEAD. LONDON: BANSON PRODUCTION.
Chicago
UNFPA UNITED NATIONS POPULATION FUND, . 1991. POPULATION AND THE ENVIRONMENT:THE CHALLENGES AHEAD. LONDON: BANSON PRODUCTION.
Harvard
UNFPA UNITED NATIONS POPULATION FUND, . (1991). POPULATION AND THE ENVIRONMENT:THE CHALLENGES AHEAD. LONDON: BANSON PRODUCTION.
MLA
UNFPA UNITED NATIONS POPULATION FUND, . POPULATION AND THE ENVIRONMENT:THE CHALLENGES AHEAD. LONDON: BANSON PRODUCTION. 1991.