Use quotation marks and state the author, date and page number(s):

“Despite equal pay laws, women still earn, on average, only about 80 per cent per hour of what men earn.” (Walsh, 2011, p. 119)

You can also use…

According to Walsh “Despite equal pay laws, women still earn, on average, only about 80 per cent per hour of what men earn.” (2011, p. 119)

When using online material, use only the author and date if a page number is not available.

Quotation marks are not used for longer quotations.  Instead, indent the quote from the body of your text:

On the surface, it is easy to see celebrity charitable endorsements as acts of altruism.  However, as Kapoor states:

…it is deeply invested in self-interest and promotion, backed by a massive marketing machine that includes management and talent agencies, entertainment lawyers, and advertising and public relations firms, each often tied to larger entertainment interests.  The integration of celebrity philanthropy and branding has enabled the creation of brand identity (the ‘humanitarian celebrity’).  (2013, p. 19)

As such, the perception of consumers can be seen to…

You can use ‘[ ]’ to add your own words to give clarification to a quote:

“The direct cost of obesity [to the NHS] is estimated to be £4.2 billion a year” (Byfield, 2012).

You can use ‘…’ to omit sections within a continuing quote:

“Since 2008 … the rich in both the US and UK manoeuvred to become much richer” (Dorling, 2014, p. 89).

When there are more than three authors, you only need to state the name of the first author followed by ‘et al.’ (this means ‘and others’):

Longhurst et al. (2008) argues that…

Use the title of the source when there is no author.  This should be italicized:

Current research (World Development Report, 2013) documents…

When you are using multiple sources from the same author in the same year you need to include lower case letters (e.g. ‘a’, ‘b’, ‘c’ etc.) to differentiate them:

Ronson (2015b) argues that…

Use ‘no date’ if there is no date of publication available:

One view (Johnston, no date) can be seen to…