from the mla handbook, fifth edition:
Do not use an apostrophe to form the plural of an abbreviation or a number:
PhDs
VCRs
1900s
fours
SAT score in the 1400s
(MLA: Modern Language Association; Handbook for Writers of Research Papers)
from the mla handbook, fifth edition:
Do not use an apostrophe to form the plural of an abbreviation or a number:
PhDs
VCRs
1900s
fours
SAT score in the 1400s
(MLA: Modern Language Association; Handbook for Writers of Research Papers)
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