APA (7th ed.) Citation

SC, C., & R, S. (2009). Clarifying the importance of HPV vaccination. Singapore medical journal, 50(8), 841.

Chicago Style (17th ed.) Citation

SC, Cooper, and Skinner R. "Clarifying the Importance of HPV Vaccination." Singapore Medical Journal 50, no. 8 (2009): 841.

MLA (9th ed.) Citation

SC, Cooper, and Skinner R. "Clarifying the Importance of HPV Vaccination." Singapore Medical Journal, vol. 50, no. 8, 2009, p. 841.