APA (7th ed.) Citation

Na'was, T. E., Sheikh Salem, M., & Alkaysi, H. N. (1990). Microbial Contamination and Preservation Efficacy of Cough Preparations.

Chicago Style (17th ed.) Citation

Na'was, T. E., M. Sheikh Salem, and H. N. Alkaysi. Microbial Contamination and Preservation Efficacy of Cough Preparations. 1990.

MLA (9th ed.) Citation

Na'was, T. E., et al. Microbial Contamination and Preservation Efficacy of Cough Preparations. 1990.