APA (7th ed.) Citation

Langfeldt, T., & Porter, M. E. (1986). Sexuality and family planning. World Health Organization. Regional Office for Europe.

Chicago Style (17th ed.) Citation

Langfeldt, T., and Michael E. Porter. Sexuality and Family Planning. Copenhagen: World Health Organization. Regional Office for Europe, 1986.

MLA (9th ed.) Citation

Langfeldt, T., and Michael E. Porter. Sexuality and Family Planning. World Health Organization. Regional Office for Europe, 1986.