Timber Research and Development Association. Timber in Temporary Works. (1984). Timber in excavations (2nd ed.). Timber Research and Development Association.
Chicago (17e ed.) BronvermeldingTimber Research and Development Association. Timber in Temporary Works. Timber in Excavations. 2nd ed. High Wycombe, Bucks.: Timber Research and Development Association, 1984.
MLA (9e ed.) BronvermeldingTimber Research and Development Association. Timber in Temporary Works. Timber in Excavations. 2nd ed. Timber Research and Development Association, 1984.