To cite the 'MARSS' package in publications use:

  Elizabeth E. Holmes, Eric J. Ward, Mark D. Scheuerell and Kellie
  Wills (2024). MARSS: Multivariate Autoregressive State-Space
  Modeling. R package version 3.11.9.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {MARSS: Multivariate Autoregressive State-Space Modeling},
    author = {Elizabeth Eli Holmes and Eric J. Ward and Mark D. Scheuerell and Kellie Wills},
    year = {2024},
    note = {R package version 3.11.9},
    url = {https://CRAN.R-project.org/package=MARSS},
  }

  Holmes, E. E., M. D. Scheuerell, and E. J. Ward (2024) Analysis of
  multivariate time-series using the MARSS package. Version 3.11.9.
  NOAA Fisheries, Northwest Fisheries Science Center, 2725 Montlake
  Blvd E., Seattle, WA 98112, DOI: 10.5281/zenodo.5781847

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Analysis of multivariate time-series using the MARSS package. Version  3.11.9},
    author = {Elizabeth Eli Holmes and Mark D. Scheuerell and Eric J. Ward},
    year = {2024},
    note = {R package version 3.11.9},
    url = {https://CRAN.R-project.org/package=MARSS/vignettes/UserGuide.pdf},
    doi = {10.5281/zenodo.5781847},
  }

  Holmes, E. E., Ward, E. J. & Wills, K. (2012) MARSS: Multivariate
  Autoregressive State-space Models for Analyzing Time-series Data. The
  R Journal. 4(1):11-19

A BibTeX entry for LaTeX users is

  @Article{,
    title = {MARSS: Multivariate autoregressive state-space models for analyzing time-series data},
    author = {Elizabeth Eli Holmes and Eric J. Ward and Kellie Wills},
    year = {2012},
    journal = {The R Journal},
    volume = {4},
    number = {1},
    pages = {30},
  }