Não informado. (1978). Forest Products Abstracts. Commonwealth Forestry Bureau.
Chicago (17e ed.) BronvermeldingNão informado. Forest Products Abstracts. Farnham Royal, Inglaterra: Commonwealth Forestry Bureau, 1978.
MLA (8e ed.) BronvermeldingNão informado. Forest Products Abstracts. Commonwealth Forestry Bureau, 1978.
Let op: Deze citaties zijn niet altijd 100% accuraat.