APA
Building Research Establishment, . (1990). Re-covering old timber roofs. Garston, Watford: Building Research Establishment.
Chicago
Building Research Establishment, . 1990. Re-covering old timber roofs. Garston, Watford: Building Research Establishment.
Harvard
Building Research Establishment, . (1990). Re-covering old timber roofs. Garston, Watford: Building Research Establishment.
MLA
Building Research Establishment, . Re-covering old timber roofs. Garston, Watford: Building Research Establishment. 1990.