Não informado. (1968). Journal of abstracts. British Ship Research Association.
Chicago (17e ed.) BronvermeldingNão informado. Journal of Abstracts. London: British Ship Research Association, 1968.
MLA (8e ed.) BronvermeldingNão informado. Journal of Abstracts. British Ship Research Association, 1968.
Let op: Deze citaties zijn niet altijd 100% accuraat.