Cita APA (7a ed.)

Smith, E. L. (1986). Genetic improvement in yield of wheat. Crop Science Society of AméricaAmérican Society of Agronomy.

Cita Chicago Style (17a ed.)

Smith, Edward L. Genetic Improvement in Yield of Wheat. Madison, Wisconsin: Crop Science Society of AméricaAmérican Society of Agronomy, 1986.

Cita MLA (8a ed.)

Smith, Edward L. Genetic Improvement in Yield of Wheat. Crop Science Society of AméricaAmérican Society of Agronomy, 1986.