Primarily, it is to avoid allegations of plagiarism and academic misconduct.
Secondarily, citing sources allows the reader to identify the sources that you relied on for your research.
It's easy: whenever you paraphrase the ideas of others, whenever you use a direct quotation, or whenever you cite a fact that isn't common knowledge, you need to cite your original sources, whether they are books, articles, lecture slides, material posted in Sakai, personal communications, or a web site.
The keys to successfully citing your sources in APA Style are:
The LabourSource database contains a variety of types of sources such as:
A generic APA Style reference list entry and an example for each of these types appears below.
Name v. Name, Volume Source Abbreviation (Series) Page (Date)
Ontario v. O.P.S.E.U., 219 L.A.C. (4th) 151 (2012)
Legislation is cited in APA Style according to standard legal citation style. In Canada, we follow the Canadian Guide to Uniform Legal Citation.
Title of Act, Statute volume abbreviation, year, chapter and section number (if necessary)
Labour Relations Act, S.O. 1995, s. 70
There are several ways to cite entries in an online reference work such as Brown & Beatty's Canadian Labour Arbitration.
Author A. & Author B. (Eds.). (Year). Title of work. Publisher
Brown, D.J.M., Beatty, D. M., & Beatty, A.J. (Eds.). (2019). Canadian Labour Arbitration, 5th ed. Thomson Reuters.
If there are no page numbers, APA Style allows you to refer to the chapter title or entry title. Since the paragraph number is often used in references to Brown & Beatty, you can include both elements as illustrated below.
Title of chapter or entry. (Year) In. A. Editor, B. Editor. (Eds.), Title of book . Publisher.
1:5300 Jurisdictional Error. (2019). In Brown, D.J.M., Beatty, D. M., & Beatty, A.J. (Eds.), Canadian Labour Arbitration, 5th ed. Thomson Reuters.