APA (7th ed.) Citation

Humphrys, C. R. (1989). Report on environmental impacts of Rivendell. [publisher not identified].

Chicago Style (17th ed.) Citation

Humphrys, C. R. Report on Environmental Impacts of Rivendell. [Place of publication not identified]: [publisher not identified], 1989.

MLA (9th ed.) Citation

Humphrys, C. R. Report on Environmental Impacts of Rivendell. [publisher not identified], 1989.