I've these references and I need them to be in GSA style as the direction below

IN-TEXT CITATIONS

When you present information that comes from another source, you need to create an in-text citation that includes both the author's last name and the four digit year of publication. This also applies to text that you will write in figure captions as variation on In-Text citation. Geological publications do not use quotations, and will paraphrase rather than quote. You can do this in one of two ways:

• Mention the author's last name in the sentence where you are presenting their findings, followed by the year in parentheses.
  • Example: Smith (2011) found evidence that suggests that the Ramapo Fault has the potential to produce a major earthquake.
• At the end of the sentence, include both the author's last name and year of publication, separated by a comma.
  • Example: Evidence suggests that the Ramapo Fault has the potential to produce a major earthquake (Smith, 2011).
• Also, for figure captions, at the end of the caption, include either "From" or "Modified from" and both the author's last name and year of publication, separated by a comma.
  • Example 1: Figure 1. Ramapo Fault is a major structure in the study area (from Smith, 2011).
  • Example 2: Figure 1. Ramapo Fault (area within the red box) is a major structure in the study area (modified from Smith, 2011).

Citing Multiple Authors

• Two authors: Include the last names of both authors either in the sentence or in parentheses.
  • Examples:
    • Brown and Matthews (2015) suggest that the Ramapo Fault will cause a major earthquake.
    • It has been suggested that the Ramapo Fault will cause a major earthquake (Brown and Matthews, 2015).
• Three authors or more: For every in-text citation, list the last name of the author followed by et al.
  • Example:
    • It has been suggested that the Ramapo Fault will cause a major earthquake (Barnes et al., 2013