Cita APA (7th ed.)

Spellman, F. R. (1997). Wastewater biosolids to compost. Technomic.

Cita Chicago (17th ed.)

Spellman, Frank R. Wastewater Biosolids to Compost. Lancaster: Technomic, 1997.

Cita MLA (9th ed.)

Spellman, Frank R. Wastewater Biosolids to Compost. Technomic, 1997.

Atenció: Aquestes cites poden no estar 100% correctes.