Gaya APA

Strahler, A, H, &, P, M. (2011). Laboratory Manual for Physical Geography 2nd Edition . United States of America: John Wiley and Sons, Inc..

Gaya MLA

Strahler, Alan, H., &, Potosnak,, Mark. "Laboratory Manual for Physical Geography 2nd Edition". United States of America: John Wiley and Sons, Inc., 2011. Text.