Não informado. (2021). Technical Literature Abstracts. American Petroleum Institute.
Chicago (17e ed.) BronvermeldingNão informado. Technical Literature Abstracts. New York: American Petroleum Institute, 2021.
MLA (8e ed.) BronvermeldingNão informado. Technical Literature Abstracts. American Petroleum Institute, 2021.
Let op: Deze citaties zijn niet altijd 100% accuraat.