APA (7th ed.) Citation

Dennel, R. W. (1972). Stone Age Farming in Bulgaria.

Chicago Style (17th ed.) Citation

Dennel, R. W. Stone Age Farming in Bulgaria. 1972.

MLA (8th ed.) Citation

Dennel, R. W. Stone Age Farming in Bulgaria. 1972.

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