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2. Bosworth HB, Oddone EZ, Weinberger M, eds. Patient treatment adherence: concepts, interventions, and measurement. Routledge, Taylor & Francis Group, 582 pages, 2006. ISBN 0805848339.
3. Identification and quantification of medication returned to Otago pharmacies;Braund;New Zealand Fam Phys,2007
4. Title 21–Food and drugs, Chapter I–Food and drug administration, Department of Health and Human Services, Subchapter C—Drugs: general, Part 203—Prescription drug marketing, Subpart D—Samples, § 203.39 Donation of drug samples to charitable institutions;CFR,2008
5. Do fixed-dose combination pills or unit-of-use packaging improve adherence? A systematic review;Connor;Bull World Health Organ,2004