APA

Chan P. K. S., Chang A. R., Yu M. Y., Li W., Chan M. Y. M., Yeung A. C. M., Cheung T., Yau T., Wong S., Yau C. & Ng H. (20091130). Age distribution of human papillomavirus infection and cervical neoplasia reflects caveats of cervical screening policies. : International journal of cancer.

Chicago

Chan Paul K S, Chang Alexander R, Yu Mei Y, Li Wai-Hon, Chan May Y M, Yeung Apple C M, Cheung Tak-Hong, Yau Tat-Nga, Wong Sze-Man, Yau Ching-Wai and Ng Ho-Keung. 20091130. Age distribution of human papillomavirus infection and cervical neoplasia reflects caveats of cervical screening policies. : International journal of cancer.

Harvard

Chan P. K. S., Chang A. R., Yu M. Y., Li W., Chan M. Y. M., Yeung A. C. M., Cheung T., Yau T., Wong S., Yau C. and Ng H. (20091130). Age distribution of human papillomavirus infection and cervical neoplasia reflects caveats of cervical screening policies. : International journal of cancer.

MLA

Chan Paul K S, Chang Alexander R, Yu Mei Y, Li Wai-Hon, Chan May Y M, Yeung Apple C M, Cheung Tak-Hong, Yau Tat-Nga, Wong Sze-Man, Yau Ching-Wai and Ng Ho-Keung. Age distribution of human papillomavirus infection and cervical neoplasia reflects caveats of cervical screening policies. : International journal of cancer. 20091130.