ABBREVIATIONS IN MLA
There are a few common trends for abbreviations that should be followed when using MLA, though there are always exceptions to these rules. For a complete list of common abbreviations used in academic writing, see Chapter 7 of the MLA Handbooks for Writers of Research Papers.
1. Do not use periods or spaces in abbreviations of all capital letters, unless it is a proper name:
US, MA, CD, HTML
P. D. James, J. R. R. Tolkein, E. B. White
2. Use a period if the abbreviation ends in a lower case letter, unless referring to an internet suffix, where the period should come before the abbreviation:
assn., conf., Eng., esp.
.com, .edu, .gov (URL suffixes)
3. Use periods between letters without spacing if each letter represents a word in common lower case abbreviations:
a.m., e.g., i.e.
Exceptions: mph, os, rpm, ns (among many others)
4. Categories of Typical Abbreviations:
    ABBREVIATIONS IN CITATIONS
    1. Remember to follow common trends to abbreviate time and location within citations:
      2. Shorten publisher's names as much as possible in book citations. Provide readers with enough information for them to identify the publisher. Many publishers can be identified by only acronyms or a shortened version of their names.
      Here is a short list of publisher abbreviations .Consult Chapter 7 of the       MLA Handbook for a more complete list.