APA (7th ed.) Citation

Boersma, L., & Nielsen, D. R. (1970). Soil water. [publisher not identified].

Chicago Style (17th ed.) Citation

Boersma, L., and Donald R. Nielsen. Soil Water. [Place of publication not identified]: [publisher not identified], 1970.

MLA (9th ed.) Citation

Boersma, L., and Donald R. Nielsen. Soil Water. [publisher not identified], 1970.