Gaya APA

Ward, R.C, Robinson, M.. (2011). Principles of hydrology (4). Hoboken, NJ: McGraw Hill.

Gaya Chicago

Ward, R.C, Robinson, M.. Principles of hydrology. 4 Hoboken, NJ: McGraw Hill, 2011. Text.

Gaya MLA

Ward, R.C, Robinson, M.. Principles of hydrology. 4 Hoboken, NJ: McGraw Hill, 2011. Text.

Gaya Turabian

Ward, R.C, Robinson, M.. Principles of hydrology. 4 Hoboken, NJ: McGraw Hill, 2011. Print.