How to write a bibliography using APA Reference List Format A guide from Purdue University on using MLA guidelines in research papers, and citing all sources from a single book to government documents. The Guide to Grammar and Writing contains scores of digital handouts on grammar and English usage, over 170 computer-graded quizzes, recommendations on writing. Please note, all entries should be typed double-spaced. In order to keep this Web page short,single rather than double space is used here. See Bibliography Sample. Research, Writing, and Style Guides (MLA, APA, Chicago/Turabian, Harvard, CGOS, CBE) The Elements of Style : William Strunk, Jr. Asserting that one must first know the rules to break them, this classic reference book is a must-have for any student and. Editing policy (Content policies) Etiquette guide (Dispute resolution) Simple rule-set; Simple style-manual Guide to word usage, grammar and punctuation for The Guardian and Observer. UK. APA (American Psychological Association) style is most commonly used to cite sources within the social sciences. This resource, revised according to the 6th edition. A style guide (or manual of style) is a set of standards for the writing and design of documents, either for general use or for a specific publication, organization.