American Payroll Institute, Inc.

year of pub­li­ca­ti­onISBNauthor(s)title
2008978-1-934951-01-9American Payroll AssociationPayroll Practice Fundamentals
2009978-1-934951-12-5Michael P. O'TooleThe Payroll Source
2010978-1-934951-25-5American Payroll AssociationPayroll Practice Fundamentals
  ''978-1-934951-26-2Michael P. O'Toole · Esq.The Payroll Source
2015978-1-934951-81-1Michael P. O'Toole · Esq.The Payroll Source
  ''978-1-934951-83-5American Payroll AssociationFederal Payroll Tax Laws & Regulations
  ''978-1-934951-86-6   ''APA's Guide to Federal and State Wage & Hour Laws
  ''978-1-934951-88-0   ''The Guide to Successful Electronic Payments