Standards are conventions, rules, and procedures necessary to define acceptable accounting practice at a particular time.
GAAP, or Generally Accepted Accounting Principles, are a set of guidelines for companies to aid in preparing financial statements according to a standard.
GAAS, or Generally Accepted Auditing Standards, are auditing standards for auditors to help ensure transparent and unbiased auditing.
Wiley GAAP 2016
Wiley Practitioner's Guide to GAAS
Wiley Not-for-Profit GAAP
Wiley GAAP for Governments 2015