APA

New horizons in meeting society's needs 8. A. 6. a. 1., Association of American Geographers (Washington D. & Association of American Geographers (Washington D. (1993). Abstracts. Washington, D. C: Association of American Geographers.

Chicago

New horizons in meeting society's needs 89 Atlanta 6-10 abril 1993, Association of American Geographers (Washington D.C.) and Association of American Geographers (Washington D.C.). 1993. Abstracts. Washington, D. C: Association of American Geographers.

Harvard

New horizons in meeting society's needs 8. A. 6. a. 1., Association of American Geographers (Washington D. and Association of American Geographers (Washington D. (1993). Abstracts. Washington, D. C: Association of American Geographers.

MLA

New horizons in meeting society's needs 89 Atlanta 6-10 abril 1993, Association of American Geographers (Washington D.C.) and Association of American Geographers (Washington D.C.). Abstracts. Washington, D. C: Association of American Geographers. 1993.