Cita APA (7th ed.)

Trefil, J. S., & Hazen, R. M. (2007). The sciences: An integrated approach (5th ed.). John Wiley & Sons, Inc.

Cita Chicago (17th ed.)

Trefil, James S., i Robert M. Hazen. The Sciences: An Integrated Approach. 5th ed. Hoboken, NJ: John Wiley & Sons, Inc, 2007.

Cita MLA (9th ed.)

Trefil, James S., i Robert M. Hazen. The Sciences: An Integrated Approach. 5th ed. John Wiley & Sons, Inc, 2007.