APA

American Chemical Society, Division of Petroleum Chemistry & Preprints vol 35 n. 4. (1990). Chemistry and characterization of asphalts. Symposium, Washington DC, August 26-31, 1990. Preprints. Washington DC: American Chemical Society.

Chicago

American Chemical Society, Division of Petroleum Chemistry and Preprints vol 35 no 4. 1990. Chemistry and characterization of asphalts. Symposium, Washington DC, August 26-31, 1990. Preprints. Washington DC: American Chemical Society.

Harvard

American Chemical Society, Division of Petroleum Chemistry and Preprints vol 35 n. 4. (1990). Chemistry and characterization of asphalts. Symposium, Washington DC, August 26-31, 1990. Preprints. Washington DC: American Chemical Society.

MLA

American Chemical Society, Division of Petroleum Chemistry and Preprints vol 35 no 4. Chemistry and characterization of asphalts. Symposium, Washington DC, August 26-31, 1990. Preprints. Washington DC: American Chemical Society. 1990.