APA (7th ed.) Citation

De Blij, H. J. (1971). Geography regions r concept. John Willey r Sons.

Chicago Style (17th ed.) Citation

De Blij, Harm J. Geography Regions R Concept. John Willey r Sons, 1971.

MLA (8th ed.) Citation

De Blij, Harm J. Geography Regions R Concept. John Willey r Sons, 1971.

Warning: These citations may not always be 100% accurate.