APA (7th ed.) Citation

Wittwer, S. H. (1974). Impact of energy restrictions on agricultural productivity. [publisher not identified].

Chicago Style (17th ed.) Citation

Wittwer, S. H. Impact of Energy Restrictions on Agricultural Productivity. [U.S.]: [publisher not identified], 1974.

MLA (9th ed.) Citation

Wittwer, S. H. Impact of Energy Restrictions on Agricultural Productivity. [publisher not identified], 1974.

Warning: These citations may not always be 100% accurate.