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

For example:

{{MSW3 Proboscidea | id = 11500009 | page = 91}}

gives

Shoshani, J. (2005). "Order Proboscidea". In Wilson, D. E.; Reeder, D. M (eds.). Mammal Species of the World (3rd ed.). Johns Hopkins University Press. p. 91. ISBN 978-0-8018-8221-0. OCLC 62265494. {{cite book}}: Invalid |ref=harv (help)

for the African bush elephant, Loxodonta africana (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).