Gaya APA

Walker., W, R., Skogerboe, G, V. (1987). Surface irrigation : Theory & Practice . Englewood Cliffs: Prentice Hall.

Gaya MLA

Walker., Wynn, R.., Skogerboe, Gaylord, V.. "Surface irrigation : Theory & Practice". Englewood Cliffs: Prentice Hall, 1987. Text.