APA استشهاد

Ritson, C. (1977). Agricultural economics: Principles and Policy. Cros by Lockwood staples.

استشهاد بنمط شيكاغو

Ritson, Christopher. Agricultural Economics: Principles and Policy. London: Cros by Lockwood staples, 1977.

MLA استشهاد

Ritson, Christopher. Agricultural Economics: Principles and Policy. Cros by Lockwood staples, 1977.