APA (7th ed.) Citation

Ruffin, E. (1961). An essay on calcareous manures. Belknap Press of Harvard University Press.

Chicago Style (17th ed.) Citation

Ruffin, Edmund. An Essay on Calcareous Manures. Cambridge: Belknap Press of Harvard University Press, 1961.

MLA (9th ed.) Citation

Ruffin, Edmund. An Essay on Calcareous Manures. Belknap Press of Harvard University Press, 1961.

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