Cita APA (7th ed.)

Block, H. &. R. (1980). Income tax workbook. Macmillan.

Cita Chicago (17th ed.)

Block, H & R. Income Tax Workbook. N.Y: Macmillan, 1980.

Cita MLA (9th ed.)

Block, H & R. Income Tax Workbook. Macmillan, 1980.