Citáce podľa APA (7th ed.)
Biogas Digest: Volume II. Biogas - Application and Product Development. Information and Advisory Serviceon Appropriate Technology.
Citácia podle Chicago (17th ed.)
Biogas Digest: Volume II. Biogas - Application and Product Development. Information and Advisory Serviceon Appropriate Technology.
Citácia podľa MLA (8th ed.)
Biogas Digest: Volume II. Biogas - Application and Product Development. Information and Advisory Serviceon Appropriate Technology.
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