SPENCER, J., & THOMAS, W. (1978). Introducing cultural geography.-- Ed.2. John Wiley and sons.

SPENCER, J.E, and W.L THOMAS. Introducing Cultural Geography.-- Ed.2. New York: John Wiley and sons, 1978.

SPENCER, J.E, and W.L THOMAS. Introducing Cultural Geography.-- Ed.2. John Wiley and sons, 1978.