APA (7th ed.) Citation

Patella, L. M. (1988). Unique dredging problems on the lower Columbia River. [publisher not identified].

Chicago Style (17th ed.) Citation

Patella, Lawrence M. Unique Dredging Problems on the Lower Columbia River. [United States?]: [publisher not identified], 1988.

MLA (9th ed.) Citation

Patella, Lawrence M. Unique Dredging Problems on the Lower Columbia River. [publisher not identified], 1988.