APA (7th ed.) Citation

Gill, N. T., & Vear, K. C. (1958). Agricultural botany. G. Duckworth.

Chicago Style (17th ed.) Citation

Gill, N. T., and K. C. Vear. Agricultural Botany. London: G. Duckworth, 1958.

MLA (8th ed.) Citation

Gill, N. T., and K. C. Vear. Agricultural Botany. G. Duckworth, 1958.