Παραπομπή APA

Bethlehem, J. (2009). Applied survey methods: A statistical perspective. John Wiley & Sons.

Παραπομπή Chicago Style

Bethlehem, Jelke. Applied Survey Methods: A Statistical Perspective. New Jersey: John Wiley & Sons, 2009.

Παραπομπή MLA

Bethlehem, Jelke. Applied Survey Methods: A Statistical Perspective. John Wiley & Sons, 2009.