Style de citation APA (7e éd.)

Sanford, W. W., Usman, S., Obot, E. O., Isichei, A. O., & Wari, M. (2014). Relationship of Woody Plants to Herbaceous Production in Nigerian Savanna.

Style de citation Chicago (17e éd.)

Sanford, William W., Sugei Usman, Emmanuel O. Obot, Augustine O. Isichei, et Musa Wari. Relationship of Woody Plants to Herbaceous Production in Nigerian Savanna. 2014.

Style de citation MLA (9e éd.)

Sanford, William W., et al. Relationship of Woody Plants to Herbaceous Production in Nigerian Savanna. 2014.