APA استشهاد

Johnson,Paul, & Zimmermann,Klaus F. (1993). Labour markets in an ageing Europe. Cambridge University Press.

استشهاد بنمط شيكاغو

Johnson,Paul, و Zimmermann,Klaus F. Labour Markets in an Ageing Europe. New York: Cambridge University Press, 1993.

MLA استشهاد

Johnson,Paul, و Zimmermann,Klaus F. Labour Markets in an Ageing Europe. Cambridge University Press, 1993.