Cita APA (7th ed.)

Lucas, J. R. (1989). Harper test: User's manual IBM version. Economics Research, Harper & Row Software.

Cita Chicago (17th ed.)

Lucas, John R. Harper Test: User's Manual IBM Version. Calif: Economics Research, Harper & Row Software, 1989.

Cita MLA (9th ed.)

Lucas, John R. Harper Test: User's Manual IBM Version. Economics Research, Harper & Row Software, 1989.