APA (7th ed.) Citation

Sarfraz, M., Hussain, M., Butt, S., & unknown. (2000). A rational spline for visualizing positive data.

Chicago Style (17th ed.) Citation

Sarfraz, M., M.Z Hussain, S. Butt, and unknown. A Rational Spline for Visualizing Positive Data. 2000.

MLA (9th ed.) Citation

Sarfraz, M., et al. A Rational Spline for Visualizing Positive Data. 2000.