APA (7th ed.) Citation

Newton, P. K. (1998). HIPPO -- an adaptive open hyptertext system.

Chicago Style (17th ed.) Citation

Newton, Paul K. HIPPO -- an Adaptive Open Hyptertext System. 1998.

MLA (9th ed.) Citation

Newton, Paul K. HIPPO -- an Adaptive Open Hyptertext System. 1998.

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