APA (7th ed.) Citation

Parker, C. J., May, A., & Mitchell, V. (2011). Relevance of volunteered geographic information in a real world context.

Chicago Style (17th ed.) Citation

Parker, Christopher J., Andrew May, and Val Mitchell. Relevance of Volunteered Geographic Information in a Real World Context. 2011.

MLA (9th ed.) Citation

Parker, Christopher J., et al. Relevance of Volunteered Geographic Information in a Real World Context. 2011.

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