These organizations set accounting, auditing, and other standards and are excellent starting points when searching for accepted practices and procedures.
American Institute of Certified Public Accountants issues auditing and other standards for the profession, most particularly the Statements on Auditing Standards
Public Company Accounting Oversight Board was created by the Sarbanes-Oxley Act of 2002 and establishes auditing and related attestation, quality control, ethics, and independence standards and rules to be used by registered public accounting firms.
Securities and Exchange Commission administers and enforces the securities laws of the United States including issuing rules and releases regulating financial reporting of public companies
Canadian Institute of Chartered Accountants supports the setting of accounting, auditing and assurance standards for business, not-for-profit organizations and government. It issues guidance on control and governance, publishes professional literature, and represents the CA profession nationally and internationally.
International Federation of Accountants also issues international standards for Auditing and Assurance, Accounting Education, Ethics standards for accountants, and Public Sector accounting