Παραπομπή APA

Harr, M. E. (1991). Groundwater and Seepage. Dover Publications.

Παραπομπή Chicago Style

Harr, Milton E. Groundwater and Seepage. New York: Dover Publications, 1991.

Παραπομπή MLA

Harr, Milton E. Groundwater and Seepage. Dover Publications, 1991.