In MLA Style, when listing the full source citations on the source page, the sources should be $...$

alphabetized according to the authors' last names. If two or more authors have the same last name, alphabetize by the first name or initial. Alphabetize sources with unknown authors by the first word of the title, excluding a$,$ an$,$ or the.

alphabetized according to the title of the large work. If two or more large works have the same title, alphabetize by the title of the short work. Alphabetize sources without titles by numbering the sources.

alphabetized according to the authors' first names. If two or more authors have the same first name, alphabetize by the title of the large work.

alphabetized according to the authors' last names and in the order in which the sources were found. If two or more authors have the same last name, alphabetize by the first name or initial. Alphabetize sources with unknown authors by the first word of the title, excluding a$,$ an$,$ or the.