Cita APA (7a ed.)
Coombes, C., & Coombes, B. Green Roofs. Chartered Institution of Building Services Engineers.
Cita estilo Chicago (17a ed.)
Coombes, Cath, y Ben Coombes. Green Roofs. Londres, Inglaterra: Chartered Institution of Building Services Engineers.
Cita MLA (9a ed.)
Coombes, Cath, y Ben Coombes. Green Roofs. Chartered Institution of Building Services Engineers.
Precaución: Estas citas no son 100% exactas.