APA (7th ed.) Citation

Riotton, G., Christopherson, W. M., & Lunt, R. (1973). Cytology of the female genital tract. World Health Organization.

Chicago Style (17th ed.) Citation

Riotton, G., William M. Christopherson, and R. Lunt. Cytology of the Female Genital Tract. Geneva: World Health Organization, 1973.

MLA (8th ed.) Citation

Riotton, G., et al. Cytology of the Female Genital Tract. World Health Organization, 1973.