APA-Zitierstil (7. Ausg.)

Fagan, M., & Andrews, M. (1977). Challenge for change: Geographical approaches to selected world issues. McGraw-Hill.

Chicago-Zitierstil (17. Ausg.)

Fagan, Margaret, und Marilyn Andrews. Challenge for Change: Geographical Approaches to Selected World Issues. Toronto [u.a.]: McGraw-Hill, 1977.

MLA-Zitierstil (9. Ausg.)

Fagan, Margaret, und Marilyn Andrews. Challenge for Change: Geographical Approaches to Selected World Issues. McGraw-Hill, 1977.