Gaya APA

Trefil, J, T, J. (2000). The sciences : an integrated approach.-- (Ed. 2.--). America: John Wiley & Sons.

Gaya MLA

Trefil, James, Trefil,, James. "The sciences : an integrated approach.--". Ed. 2.-- America: John Wiley & Sons, 2000. Buku.