Cita APA (7th ed.)

Hannaford, J. (1968). Student's guide to Heilbroner: The economic problem. Prentice-Hall.

Cita Chicago (17th ed.)

Hannaford, John. Student's Guide to Heilbroner: The Economic Problem. Englewood Cliffs, N.J: Prentice-Hall, 1968.

Cita MLA (9th ed.)

Hannaford, John. Student's Guide to Heilbroner: The Economic Problem. Prentice-Hall, 1968.