Gaya APA

Zaslavsky, J, B, D., Irmay, S. (1968). Physical Principles Of Water Percolation And Seepage (--). Paris: Unesco.

Gaya MLA

Zaslavsky, J., Bear,, D.., Irmay, S.. "Physical Principles Of Water Percolation And Seepage". -- Paris: Unesco, 1968. Text.