Cita APA (7a ed.)

Gray, T. (1971). Soil micro-organisms. Oliver and Boyd.

Cita Chicago Style (17a ed.)

Gray, T.R.G. Soil Micro-organisms. Edinburgh: Oliver and Boyd, 1971.

Cita MLA (8a ed.)

Gray, T.R.G. Soil Micro-organisms. Oliver and Boyd, 1971.