APA
Howarth R. B., . (1971). Questions and answers on economic geography. London: Butterworths.
Chicago
Howarth Raymond Bernard, . 1971. Questions and answers on economic geography. London: Butterworths.
Harvard
Howarth R. B., . (1971). Questions and answers on economic geography. London: Butterworths.
MLA
Howarth Raymond Bernard, . Questions and answers on economic geography. London: Butterworths. 1971.