Jones, B. L., & Nagin, D. (2007). Advances in group-based trajectory modeling and an SAS procedure for estimating them. Sociological methods and research, 35(4), 542-571. doi:10.1177/0049124106292364
Chicago Style (17th ed.) CitationJones, Bobby L., and Daniel Nagin. "Advances in Group-based Trajectory Modeling and an SAS Procedure for Estimating Them." Sociological Methods and Research 35, no. 4 (2007): 542-571. https://doi.org/10.1177/0049124106292364.
MLA (9th ed.) CitationJones, Bobby L., and Daniel Nagin. "Advances in Group-based Trajectory Modeling and an SAS Procedure for Estimating Them." Sociological Methods and Research, vol. 35, no. 4, 2007, pp. 542-571, https://doi.org/10.1177/0049124106292364.
Warning: These citations may not always be 100% accurate.