APA (7th ed.) Citation

Darlington, A., & Smyth, J. (1967). Keys to small organisms in soil, litter and water troughs. Longmans/Penguin Books.

Chicago Style (17th ed.) Citation

Darlington, A., and J.C Smyth. Keys to Small Organisms in Soil, Litter and Water Troughs. London: Longmans/Penguin Books, 1967.

MLA (9th ed.) Citation

Darlington, A., and J.C Smyth. Keys to Small Organisms in Soil, Litter and Water Troughs. Longmans/Penguin Books, 1967.