Παραπομπή σε μορφή APA (7η εκδ.)

(2005). Effect on survey response rate of hand written versus printed signature on a covering letter: Randomised controlled trial [ISRCTN67566265]. BioMed Central.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Effect on Survey Response Rate of Hand Written versus Printed Signature on a Covering Letter: Randomised Controlled Trial [ISRCTN67566265]. BioMed Central, 2005.

Παραπομπή σε μορφή MLA (9th εκδ.)

Effect on Survey Response Rate of Hand Written versus Printed Signature on a Covering Letter: Randomised Controlled Trial [ISRCTN67566265]. BioMed Central, 2005.