APA (7th ed.) Citation

(2014). The location of Oort Cloud comets C/2011 L4 Panstarrs and C/2012 S1 ISON on a comet evolutionary diagram.

Chicago Style (17th ed.) Citation

The Location of Oort Cloud Comets C/2011 L4 Panstarrs and C/2012 S1 ISON on a Comet Evolutionary Diagram. 2014.

MLA (8th ed.) Citation

The Location of Oort Cloud Comets C/2011 L4 Panstarrs and C/2012 S1 ISON on a Comet Evolutionary Diagram. 2014.

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