APA (7e ed.) Bronvermelding

British Standards Institution. (1971). Method for determination of asphaltenes in petroleum products (precipitation of normal heptane). B.S.I..

Chicago (17e ed.) Bronvermelding

British Standards Institution. Method for Determination of Asphaltenes in Petroleum Products (precipitation of Normal Heptane). London: B.S.I., 1971.

MLA (8e ed.) Bronvermelding

British Standards Institution. Method for Determination of Asphaltenes in Petroleum Products (precipitation of Normal Heptane). B.S.I., 1971.