APA Citation

Johnson, M. W., Ayers, J. E., & Williams, R. L. (1991). 1990 Pennsylvonia corn performance studies. (n.p): Penn State.

Chicago Style Citation

Johnson, M. W., J. E. Ayers, and R. L. Williams. 1990 Pennsylvonia Corn Performance Studies. (n.p): Penn State, 1991.

MLA Citation

Johnson, M. W., J. E. Ayers, and R. L. Williams. 1990 Pennsylvonia Corn Performance Studies. (n.p): Penn State, 1991.

Warning: These citations may not always be 100% accurate.