Articles on Scholarly Legal Writing:

Eugene Volokh, Writing a Student Article, 48 J. LEGAL ED. 247 (1998) (link to article on Westlaw).

An overview of the entire writing process from topic selection, through organization of the article and drafts. (At the end is a chart of awkward words and phrases to avoid in writing).

Books on Scholarly Legal Writing:

Elizabeth Fajans & Mary R. Falk, SCHOLARLY WRITING FOR LAW STUDENTS: SEMINAR PAPERS, LAW REVIEW NOTES, AND LAW REVIEW COMPETITION PAPERS
(On Reserve: KF250 .F35 2005).

A classic reference on the process of writing a law review or law journal article. (The 3rd edition is on reserve).

Eugene Volokh, ACADEMIC LEGAL WRITING: LAW REVIEW ARTICLES, STUDENT NOTES, SEMINAR PAPERS, AND GETTING ON LAW REVIEW
(On Reserve: KF250 .V65 2005).

Avoiding Plagiarism:

George Washington University Law School, Citing Responsibly: A Guide to Avoiding Plagiarism (Revised Summer 2003).

A handbook put out by the Committee on Academic Integrity at George Washington University Law School. This handbook answers some common questions concerning plagiarism and proper citation.

Legal Writing Institute, Law Student Plagiarism: You can't afford it! (2001).

A brochure produced by the Legal Writing Institute describing what constitutes plagiarism, giving examples of proper and improper attribution, and discussing the consequences of plagiarism in law schools.