This template takes an optional id parameter and heading for the MSW3 entry on the species or other subtaxon in question.

For example:

{{MSW3 Aplodontiidae | id = 12300004 }} 

gives

Helgen, K. M. (2005). "Family Aplodontiidae". In Wilson, D. E.; Reeder, D. M (eds.). Mammal Species of the World (3rd ed.). Johns Hopkins University Press. p. 753. ISBN 978-0-8018-8221-0. OCLC 62265494. {{cite book}}: Invalid |ref=harv (help)

for the mountain beaver, Aplodontia rufa (the chapter link goes to the MSW3 web page for the species entry, while the title link goes to the Google Books preview for MSW3).