PCM redirects here. For other uses, see PCM (disambiguation). Pulse-code modulation (PCM) is a method used to digitally represent sampled analog signals. It is the standard form of digital audio in computers, compact discs, digital telephony and other digital audio applications. In a PCM stream, the amplitude of the analog signal is sampled regularly at uniform intervals, and each sample is quantized to the nearest value within a range of digital steps.
1 As well as MLA, APA papers are also double-spaced with 1-inch margins on each side. 2  APA guidelines recommend you to use readable and clear font, such as Times New Roman, 12 pt.  The main distinction of APA style is a ârunning headâ at the top of each page.
This page will show how to cite resources in the APA style in the text of your document. The APA style requires two pieces of information to always be present for in-text citations; the author's last name, and the date of publication. If there is a direct quote from the materials you must also include a page number.hen referencing a source, the citation would look like this: Students love using APA style (Smith, Brown & Jones, 2005), ... When referencing a source material and you mention the name of the author in the text, it would look like this: Smith, Brown, and Jones (2005) showed evidence of students using APA style ...