Boehm, R. G. (1998). Geography: The World and its people : Activity workbook. New York: Glencoe/McGraw-Hill.
Chicago Style aipamenaBoehm, Ricchard G. Geography: The World and Its People : Activity Workbook. New York: Glencoe/McGraw-Hill, 1998.
MLA aipamenaBoehm, Ricchard G. Geography: The World and Its People : Activity Workbook. New York: Glencoe/McGraw-Hill, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.