When citing your sources in-text, number them in the order in which they appear in the text using a superscript arabic numeral.
Your sources are listed in numeric order in the References section of your paper (see Reference List tab for example).
"Type 2 diabetes in normal-weight adults is an understudied representation of the metabolically obese normal-weight phenotype that has become increasingly common over time. It is not known whether the “obesity paradox” that has been observed in chronic diseases such as heart failure, chronic kidney disease, and hypertension extends to adults who are normal weight at the time of incident diabetes. - In 2 contemporary studies, the Translating Research Into Action for Diabetes (TRIAD) study and the PROactive trial, participants ...."