APA (7th ed.) Citation

Roberts, H., & Duller, G. (2011). Silbury Hill, Wiltshire: Luminescence sampling. English Heritage.

Chicago Style (17th ed.) Citation

Roberts, Helen, and Geoff Duller. Silbury Hill, Wiltshire: Luminescence Sampling. Portsmouth: English Heritage, 2011.

MLA (9th ed.) Citation

Roberts, Helen, and Geoff Duller. Silbury Hill, Wiltshire: Luminescence Sampling. English Heritage, 2011.

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