APA (7th ed.) Citation

Calkins, P. H. (1977). Four approaches to risk and uncertainity for use in farm management extension. Food & Fertilizer Technology Center.

Chicago Style (17th ed.) Citation

Calkins, Peter H. Four Approaches to Risk and Uncertainity for Use in Farm Management Extension. Taipei City,China: Food & Fertilizer Technology Center, 1977.

MLA (9th ed.) Citation

Calkins, Peter H. Four Approaches to Risk and Uncertainity for Use in Farm Management Extension. Food & Fertilizer Technology Center, 1977.