1. Hydrology and water resources of small islands: a practical guide, UNESCO;Falkland;Imprimerie de la Manutention, Paris,1991
2. R. Bonita, M.A. Mardyanto, Studi water balance air tanah di Kecamatan Kejayan, Kabupaten Pasuruan, Provinsi Jawa Timur, Jurnal Teknik ITS Vol. 4, No. 1, (2015) ISSN 2337-3539 (2301-9271 Printed), Surabaya.
3. SWB-A modified Thornthwaite-Mater Soil-Water-Balance code for estimating groundwater recharge: U.S;Westenbroek;Geological Survey Techniques and Methods,2010
4. G.J. McCabe, S.L. Markstrom, A monthly water-balance model driven by a graphical user interface: U.S. Geological Survey Open-File report 2007-1088, 6 p.
5. Instruction and Tables for computing evapotranspiration and water balance;Thornthwaite;Publication in Climatology. Drexel Institute of Technology, Laboratory of Climatology,1957