Não informado. (1953). Tropical abstracts. Royal Tropical Institute.
Chicago (17e ed.) BronvermeldingNão informado. Tropical Abstracts. Amsterdam: Royal Tropical Institute, 1953.
MLA (8e ed.) BronvermeldingNão informado. Tropical Abstracts. Royal Tropical Institute, 1953.
Let op: Deze citaties zijn niet altijd 100% accuraat.