Van Solingen, R., Kusters, R. J., Trienekens, J. J. M., & Van Uijtregt, A. (1999). Product-focused software process improvement (P-SPI): Concepts and their application. Quality & Reliability Engineering International, 15(6), 475. https://doi.org/10.1002/(SICI)1099-1638(199911/12)15:6<475::AID-QRE296>3.0.CO;2-1
Chicago Style (17th ed.) CitationVan Solingen, Rini, Rob J. Kusters, Jos J. M. Trienekens, and Arnim Van Uijtregt. "Product-focused Software Process Improvement (P-SPI): Concepts and Their Application." Quality & Reliability Engineering International 15, no. 6 (1999): 475. https://doi.org/10.1002/(SICI)1099-1638(199911/12)15:6<475::AID-QRE296>3.0.CO;2-1.
MLA (9th ed.) CitationVan Solingen, Rini, et al. "Product-focused Software Process Improvement (P-SPI): Concepts and Their Application." Quality & Reliability Engineering International, vol. 15, no. 6, 1999, p. 475, https://doi.org/10.1002/(SICI)1099-1638(199911/12)15:6<475::AID-QRE296>3.0.CO;2-1.