Cita APA (7th ed.)

Trefil, J. S., & Hazen, R. M. (1998). The sciences an integrated approach [study guide]. John Wiley and Sons, Inc.

Cita Chicago (17th ed.)

Trefil, James S., i Robert M. Hazen. The Sciences an Integrated Approach [study Guide]. New York: John Wiley and Sons, Inc, 1998.

Cita MLA (9th ed.)

Trefil, James S., i Robert M. Hazen. The Sciences an Integrated Approach [study Guide]. John Wiley and Sons, Inc, 1998.