Bruns, A., Bruns, H., & Schmidt, G. (1987). El cultivo biologico: Vida sana y natural. Blume.
Chicago Style (17th ed.) CitationBruns, Annelore, Hubert Bruns, and Gerhard Schmidt. El Cultivo Biologico: Vida Sana Y Natural. Barcelona, España: Blume, 1987.
MLA (9th ed.) CitationBruns, Annelore, et al. El Cultivo Biologico: Vida Sana Y Natural. Blume, 1987.
Warning: These citations may not always be 100% accurate.