Cita APA (7th ed.)

Hirschberg, S., & Hirschberg, T. (2003). Past to present: Ideas that changed our world. Prentice Hall.

Cita Chicago (17th ed.)

Hirschberg, Stuart, i Terry Hirschberg. Past to Present: Ideas That Changed Our World. Upper Saddle River, N.J: Prentice Hall, 2003.

Cita MLA (9th ed.)

Hirschberg, Stuart, i Terry Hirschberg. Past to Present: Ideas That Changed Our World. Prentice Hall, 2003.