Author, A., Author, B., Author, C., Author, D., Author, E., Author, F., ...Author, H. (Date of publication). Title of book (ed.). Place of publication, Country (Abbreviated state instead of country for USA): Publisher.
Watson, S., Gunasekara, G., Gedye, M., van Roy, Y., Ross, M., Longdin, L., ... Brown, L. (2009). Law of business organisations (5th ed.). Auckland, New Zealand: Palatine Press.
Example—reference list entry
Watson, S., Gunasekara, G., Gedye, M., van Roy, Y., Ross, M., Longdin, L., ... Brown, L. (2009). Law of business organisations (5th ed.). Auckland, New Zealand: Palatine Press.
Example—in-text citation
Watson et al. (2009) explain that … (p. 58).
or
… (Watson et al., 2009, p. 58).