Turner, Chris, 1937- AS law unit 2570 sources of law / module 2570 : Chris Turner and Leon Riley - Oxfordshire, England : Philip Allan Updates, 2005. - 72 p. ; 25 cm. - Student unit guide. . Introduction - Content guidance - Questions and answers ISBN: 184489018X (pbk.) Subjects--Topical Terms: Law--Examinations--Study guides Dewey Class. No.: 349.42 / TUR