APA (7a ed.)

Dhillon, B. S., Zimmer, E., Paul, C., Gurrath, P. a., Klein, D., & Pollmer, W. G. (1990). Variation and covariation in stover digetibility traits in diallel crosses of maize / B. S. Dhillon, Chr. Paul, E. Zimmer...[et al.]. Crop Science, 30.