Gaya APA

Trefil, J., Hazen, R, M. (2000). The Sciences : An Integrated Approach . Amerika Serikat: Jhon Wiey & Sons, Inc.

Gaya MLA

Trefil, James., Hazen, Robert, M.. "The Sciences : An Integrated Approach". Amerika Serikat: Jhon Wiey & Sons, Inc, 2000. Text.