APA Style (7th ed.)
Include publisher information for print material such as books and book chapters, and digital material including data sets, and computer software and mobile apps (American Psychological Association [APA], 2020, p. 295). When referencing print books and reports, provide the publisher name as briefly as possible, without the publication location or superfluous terms or designations of business structure, such as “Co.”, “Ltd.”, “Inc.”, but “do not abbreviate the publisher name unless it is shown in abbreviated form on the work” (APA, 2020, p. 296). Do not note the publisher’s location in electronic resources; instead, provide the electronic retrieval details for the resource, such as a DOI or URL.
Occasionally, reference entries for works with specific locations, such as conference materials, will include the location in the source element. In this case, "provide the city; state, province, or territory as applicable; and country" and "use the two-letter postal code abbreviations for U.S. states and the analogous abbreviations (if any) for states, provinces, or territories in other countries" (APA, 2020, p.297). The United States Postal Service's official list of state abbreviations can be found here.
Reference
American Psychological Association. (2020). Publication manual of the American Psychological Association (7th ed.). https://doi.org/10.1037/0000165-000
