Cite lab manuals as you do books, including as much information as possible. For lab manuals authored by your instructor, use your instructor as the author and the university as the publisher.
Author 1; Author 2; etc. Title of Book, Edition Number; Publisher: Location, Year; Volume number, pp Pages Used.
Bird, P. Chemistry 206 Laboratory Manual; Concordia University: Montreal, QC, 2010; p 21.