& so on
When is it proper to substitute an ampersand (&) for the word and? Dan Santow of Word Wise provides these rules:
[T]hough an ampersand is the symbol form of the word “and,” it is not a substitute for the written-out word except in these very specific cases:
• where it is part of a company name (Abercrombie & Fitch)
• if space is very limited (such as in a small advertisement or headline)
• for artistic reasons (such as in a logo)
• in some computer languages (such as in JavaScript)
• in some academic references (Burke & Edison, 2002)Other than for the reasons above, always write out the word “and.”
I would add that, for legal citations, check your Bluebook or ALWD manual.
