APA

Peters J. W. B., Koot H. M., Grunau R. E., de Boer J., van Druenen M. J., Tibboel D. & Duivenvoorden H. J. (20031229). Neonatal Facial Coding System for assessing postoperative pain in infants: item reduction is valid and feasible. : The Clinical journal of pain.

Chicago

Peters Jeroen W B, Koot Hans M, Grunau Ruth E, de Boer Josien, van Druenen Marieke J, Tibboel Dick and Duivenvoorden Hugo J. 20031229. Neonatal Facial Coding System for assessing postoperative pain in infants: item reduction is valid and feasible. : The Clinical journal of pain.

Harvard

Peters J. W. B., Koot H. M., Grunau R. E., de Boer J., van Druenen M. J., Tibboel D. and Duivenvoorden H. J. (20031229). Neonatal Facial Coding System for assessing postoperative pain in infants: item reduction is valid and feasible. : The Clinical journal of pain.

MLA

Peters Jeroen W B, Koot Hans M, Grunau Ruth E, de Boer Josien, van Druenen Marieke J, Tibboel Dick and Duivenvoorden Hugo J. Neonatal Facial Coding System for assessing postoperative pain in infants: item reduction is valid and feasible. : The Clinical journal of pain. 20031229.