Cita APA

Koletzko, S., Griffiths, A., Corey, M., Smith, C., & Sherman, P. (1991). Infant feeding practices and ulcerative colitis in childhood.

Chicago Style Citation

Koletzko, S., A. Griffiths, M. Corey, C. Smith, i P. Sherman. Infant Feeding Practices and Ulcerative Colitis in Childhood. 1991.

Cita MLA

Koletzko, S., et al. Infant Feeding Practices and Ulcerative Colitis in Childhood. 1991.