L.S.

I am writing my thesis and have a problem with the references system of word. I am using APA 6th edition in Word 2010. It works perfectly except for one tiny but significant annoyance: When an article has three or more authors, they should all appear in the reference list (bibliography). However, when citing them in the text, only the first author + "et al." should appear.

EXAMPLE:

What word does:
Word is a nice programme (Gates, Jobs, Obama, & Romney, 2013).

What I want it to do:
Word is a nice programme (Gates et al., 2013).

Is there a way I can change this and make Word do what I want?

Thanks in advance for your help!