Gaya APA

Merz, E., Liefbroer, A, C. (2012). The Attitude Toward Voluntary Childlessness in Europe: Cultural and Institutional Explanations . : Wiley-Blackwell.

Gaya MLA

Merz, Eva-Maria., Liefbroer, Aart, C.. "The Attitude Toward Voluntary Childlessness in Europe: Cultural and Institutional Explanations". : Wiley-Blackwell, 2012. e-journal.