Patten, Mildred L Understanding research methods : an overview of the essentials / Mildred L. Patten and Michelle Newhart. - Tenth edition. - New York : Routledge, c2018. - xiv, 338 pages : illustrations ; 26 cm. Includes index. ISBN: 9780415790529 (Pbk.) Subjects--Topical Terms: Research--Methodology. LC Class. No.: Q180.55 / P38 2018