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MLA

Vieira, R.F, C Vieira, and P.G Berger. "Association of Beans with Maize In Simultaneous Planting System: Effect of Spatial Arrangements." , 190-191.. Print

APA

Vieira, R., Vieira, C., & Berger, P. (0000). Association of beans with maize in simultaneous planting system: effect of spatial arrangements.

Chicago

Vieira, R.F., C Vieira, and P.G Berger. "Association of beans with maize in simultaneous planting system: effect of spatial arrangements" (1998): 190-191..