MLA Citation Style 9th Edition: Publisher

• This element begins with a capital letter because it will almost always be a proper noun.
• Use shortened forms of publisher names (see a list of common abbreviations in MLA 293-295)
  • For example, "University Press" is shortened to "UP"; Department to Dept. 
  • Omit all business words like "Company", "Corporation", "Incorporated", and "Limited".
  • Omit initial articles such as "The".
• If more than one party appears to be equally responsible for the source, document both separated by a forward slash "/".
• If the name of a publisher is not indicated on the source cited, omit this element.  Do not use n.p.
  • Omit the publisher element for sources that do not have a publisher (MLA 5.54). Common examples include articles from ongoing publications (journals, magazines, and newspapers), self-published works, websites with no publisher listed, websites which use the publisher's name as the title, and websites functioning as a container instead of a publisher like YouTube, WordPress.com, JSTOR, etc.
  • But if the information is available in another reliable source, cite the name in square brackets, and add a question mark if uncertain (MLA 5.122);
• When an organization is both author and publisher of a work, the organization’s name is now given only once, usually as the publisher (MLA 5.19). No author is stated.
• If the publisher is a government agency with many sub-agencies, list only the primary agency.
• This element ends with a comma.

Book:

Brinkley, Alan, The Unfinished Nation: A Concise History of the American People. 7th ed, McGraw Hill, 2014, p. 525.