Cita APA (7th ed.)

SAMUELSON, P. A. (1980). Economics assisted. McGraw-Hill Kogakusha.

Cita Chicago (17th ed.)

SAMUELSON, Paul A. Economics Assisted. Tokyo: McGraw-Hill Kogakusha, 1980.

Cita MLA (9th ed.)

SAMUELSON, Paul A. Economics Assisted. McGraw-Hill Kogakusha, 1980.