APA (7th ed.) Citation

Siddiqui, M. N., & unknown. (1988). Separation and Characterization of Asphaltenes From Saudi Arabian Crudes.

Chicago Style (17th ed.) Citation

Siddiqui, Mohammad Nahid, and unknown. Separation and Characterization of Asphaltenes From Saudi Arabian Crudes. 1988.

MLA (9th ed.) Citation

Siddiqui, Mohammad Nahid, and unknown. Separation and Characterization of Asphaltenes From Saudi Arabian Crudes. 1988.

Warning: These citations may not always be 100% accurate.