Cita APA

Beckman, N., Waern, M., Gustafson, D., & Skoog, I. (2008). Secular trends in self reported sexual activity and satisfaction in Swedish 70 year olds: Cross sectional survey of four populations, 1971-2001. BMJ Publishing Group Ltd.

Citación estilo Chicago

Beckman, Nils, Margda Waern, Deborah Gustafson, y Ingmar Skoog. Secular Trends in Self Reported Sexual Activity and Satisfaction in Swedish 70 Year Olds: Cross Sectional Survey of Four Populations, 1971-2001. BMJ Publishing Group Ltd, 2008.

Cita MLA

Beckman, Nils, Margda Waern, Deborah Gustafson, y Ingmar Skoog. Secular Trends in Self Reported Sexual Activity and Satisfaction in Swedish 70 Year Olds: Cross Sectional Survey of Four Populations, 1971-2001. BMJ Publishing Group Ltd, 2008.