APA (7th ed.) Citation

Al-Abdul Wahab, H., & unknown. (1998). Polymer modification of Arab asphalt.

Chicago Style (17th ed.) Citation

Al-Abdul Wahab, H.I, and unknown. Polymer Modification of Arab Asphalt. 1998.

MLA (9th ed.) Citation

Al-Abdul Wahab, H.I, and unknown. Polymer Modification of Arab Asphalt. 1998.

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