APA (7th ed.) Citation

Collaboration, I., & Sarkar, S. (2014). Letter of Intent: The Precision IceCube Next Generation Upgrade (PINGU).

Chicago Style (17th ed.) Citation

Collaboration, IceCube, and S. Sarkar. Letter of Intent: The Precision IceCube Next Generation Upgrade (PINGU). 2014.

MLA (9th ed.) Citation

Collaboration, IceCube, and S. Sarkar. Letter of Intent: The Precision IceCube Next Generation Upgrade (PINGU). 2014.

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