APA استشهاد

Drummond,H Evan, & Goodwin,John W. (1982). Agricultural economics (2.). Reston Publishing Company.

استشهاد بنمط شيكاغو

Drummond,H Evan, و Goodwin,John W. Agricultural Economics. 2. Virginia: Reston Publishing Company, 1982.

MLA استشهاد

Drummond,H Evan, و Goodwin,John W. Agricultural Economics. 2. Reston Publishing Company, 1982.