APA

Kramer M. S., Kakuma R., ebrary I., World Health Organization & World Health Organization. (2002). The optimal duration of exclusive breastfeeding. Geneva: Dept. of Nutrition for Health and Development, Dept. of Child and Adolescent Health and Development, World Health Organization.

Chicago

Kramer Michael S, Kakuma Ritsuko, ebrary Inc, World Health Organization and World Health Organization. 2002. The optimal duration of exclusive breastfeeding. Geneva: Dept. of Nutrition for Health and Development, Dept. of Child and Adolescent Health and Development, World Health Organization.

Harvard

Kramer M. S., Kakuma R., ebrary I., World Health Organization and World Health Organization. (2002). The optimal duration of exclusive breastfeeding. Geneva: Dept. of Nutrition for Health and Development, Dept. of Child and Adolescent Health and Development, World Health Organization.

MLA

Kramer Michael S, Kakuma Ritsuko, ebrary Inc, World Health Organization and World Health Organization. The optimal duration of exclusive breastfeeding. Geneva: Dept. of Nutrition for Health and Development, Dept. of Child and Adolescent Health and Development, World Health Organization. 2002.