APA način citiranja (7. izdanje)
Coombes, C., & Coombes, B. Green Roofs. Chartered Institution of Building Services Engineers.
Čikaški stil citiranja (17. izdanje)
Coombes, Cath, i Ben Coombes. Green Roofs. Londres, Inglaterra: Chartered Institution of Building Services Engineers.
MLA način citiranja (9. izdanje)
Coombes, Cath, i Ben Coombes. Green Roofs. Chartered Institution of Building Services Engineers.
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