APA (7th ed.) Citation

YM, I., WF, E., AF, Y., & AR, S. (2010). Spectrophotometric determination of sildenafil citrate in pure form and in pharmaceutical formulation using some chromotropic acid azo dyes. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 75(4), 1297. https://doi.org/10.1016/j.saa.2009.12.068

Chicago Style (17th ed.) Citation

YM, Issa, El-Hawary WF, Youssef AF, and Senosy AR. "Spectrophotometric Determination of Sildenafil Citrate in Pure Form and in Pharmaceutical Formulation Using Some Chromotropic Acid Azo Dyes." Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy 75, no. 4 (2010): 1297. https://doi.org/10.1016/j.saa.2009.12.068.

MLA (9th ed.) Citation

YM, Issa, et al. "Spectrophotometric Determination of Sildenafil Citrate in Pure Form and in Pharmaceutical Formulation Using Some Chromotropic Acid Azo Dyes." Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy, vol. 75, no. 4, 2010, p. 1297, https://doi.org/10.1016/j.saa.2009.12.068.