Cite Them Right 11th edition - Harvard

Stephan Brumme, Fachgebiet Computergrafische Systeme and The Pennsylvania State University Cite Seer X Archives (no date) “The Open GL Shading Language”, http://www.stephan-brumme.com/download/shader/GLSL.pdf [Preprint].

Chicago Manual of Style 17th edition (full note)

Stephan Brumme, Fachgebiet Computergrafische Systeme, and The Pennsylvania State University Cite Seer X Archives. “The Open GL Shading Language”. http://www.stephan-brumme.com/download/shader/GLSL.Pdf, n.d.

American Psychological Association 7th edition

Stephan Brumme, Fachgebiet Computergrafische Systeme, & The Pennsylvania State University Cite Seer X Archives. (n.d.). The Open GL Shading Language. http://www.stephan-brumme.com/download/shader/GLSL.Pdf.

Modern Language Association 9th edition

Stephan Brumme, Fachgebiet Computergrafische Systeme, and The Pennsylvania State University Cite Seer X Archives. “The Open GL Shading Language”. http://www.stephan-brumme.com/download/shader/GLSL.Pdf.

ISO-690 (author-date, Deutsch)

STEPHAN BRUMME, FACHGEBIET COMPUTERGRAFISCHE SYSTEME and THE PENNSYLVANIA STATE UNIVERSITY CITESEERX ARCHIVES, [kein Datum]. The Open GL Shading Language. http://www.stephan-brumme.com/download/shader/GLSL.pdf

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