Παραπομπή σε μορφή APA (7η εκδ.)

(2018). Foreword to the third edition - Field Trials of Health Interventions - NCBI Bookshelf.pdf. Oxford University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Foreword to the Third Edition - Field Trials of Health Interventions - NCBI Bookshelf.pdf. Oxford University Press, 2018.

Παραπομπή σε μορφή MLA (8th εκδ.)

Foreword to the Third Edition - Field Trials of Health Interventions - NCBI Bookshelf.pdf. Oxford University Press, 2018.