APA 7th Edition
Smith, J. A., Johnson, B. C., Williams, D. E., & Brown, F. G. (2022). Collaborative research methods in psychology. Journal of Research Methods, 45(3), 234-256. https://doi.org/10.1234/jrm.2022.456
In-text (first & subsequent): (Smith et al., 2022) - always use "et al." for 3+ authors in APA 7
MLA 9th Edition
Smith, John A., et al. "Collaborative Research Methods in Psychology." Journal of Research Methods, vol. 45, no. 3, 2022, pp. 234-256.
In-text: (Smith et al. 240) or Smith et al. argue that...
Harvard Style
Smith, J.A., Johnson, B.C., Williams, D.E. and Brown, F.G. (2022) 'Collaborative research methods in psychology', Journal of Research Methods, 45(3), pp. 234-256. doi: 10.1234/jrm.2022.456.
In-text (first): (Smith et al., 2022) - use "et al." for 4+ authors
Chicago Style (Author-Date)
Smith, John A., Brian C. Johnson, David E. Williams, and Frank G. Brown. 2022. "Collaborative Research Methods in Psychology." Journal of Research Methods 45 (3): 234-256. https://doi.org/10.1234/jrm.2022.456.
In-text: (Smith et al. 2022, 240) - use "et al." for 4+ authors