APA (7th ed.) Citation

Willmott, C. J. (1977). WATBUG: A FORTRAN IV algorithm for calculating the climatic water budget. Water Resources Center, University of Delaware.

Chicago Style (17th ed.) Citation

Willmott, Cort J. WATBUG: A FORTRAN IV Algorithm for Calculating the Climatic Water Budget. Newark, Del.: Water Resources Center, University of Delaware, 1977.

MLA (9th ed.) Citation

Willmott, Cort J. WATBUG: A FORTRAN IV Algorithm for Calculating the Climatic Water Budget. Water Resources Center, University of Delaware, 1977.