Cita APA
ebrary, Inc, & Sack, R. D. (2002). Progress: Geographical essays. Johns Hopkins University Press.
Citación estilo Chicago
ebrary, Inc, and Robert David Sack. Progress: Geographical Essays. Baltimore: Johns Hopkins University Press, 2002.
Cita MLA
ebrary, Inc, and Robert David Sack. Progress: Geographical Essays. Johns Hopkins University Press, 2002.
Warning: These citations may not always be 100% accurate.