APA (7th ed.) Citation

United States. Bureau of Agricultural Economics & Olsen, N. A. (1930). Land utilization as national problem. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Bureau of Agricultural Economics and Nils Andreas Olsen. Land Utilization as National Problem. [Place of publication not identified]: [publisher not identified], 1930.

MLA (9th ed.) Citation

United States. Bureau of Agricultural Economics and Nils Andreas Olsen. Land Utilization as National Problem. [publisher not identified], 1930.