According to the ASA Style Guide for in-text citations and references,
A) it is only necessary to cite sources that are directly quoted.
B) in-text citations should include the author(s) and year of publication.
C) all in-text citations should include relevant page numbers.
D) all in-text citations should include the names of all the authors of cited works.

Question

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According to the ASA Style Guide, in-text citations should include the author(s) and year of publication. This ensures the reader can easily locate the complete reference in the reference list. While including page numbers is often recommended, it is not always necessary, especially if the source is not paginated (e.g., a website). Including all authors' names is often only required if there are three or fewer authors; otherwise, you can use "et al." after the first author's name. Additionally, it is necessary to cite sources that are both directly and indirectly quoted or paraphrased.

According to the ASA Style Guide for In-Text Citations and References